When the evil Shadow Line begins to use their evil train the Kuliner to kidnap children, a young man named Right is amongst those nearly captured. He then sees the prismatic Rainbow Line and its Ressha trains appear, along with four of the ToQgers, inspiring him to help protect the children with them.

The ToQgers arrive at a train station taken over by the Shadow Line which has been renamed "Kettougahara" controlled by the Shadow Line's Saber Shadow who makes everyone duel. Right and the others do their hardest to protect a boy who is scared at what the Shadow Line has done to his neighborhood and figure out a way to end the Shadow Line's control.

After Ticket warns the ToQgers that the Ressha trains will not wait for them, Kagura is left behind and despite her fears must take on Chain Shadow by herself.

When having some time off at a station stop, Tokatti loses his Rainbow Pass somewhere, forcing him to follow the others on standard forms of transportation. While Right, Hikari, and Kagura battle a Shadow Kaijin, Mio helps Tokatti search for his missing pass.

The Rainbow Line makes an abrupt stop at a river, requiring the use of the Car Carrier Ressha to cross, but their Imagination is not enough to power it. As Tokatti and the others try to come up with a way to cross, Bucket Shadow starts to collect darkness by making people feel hungry. However, Right comes across a campsite and campers under the Shadow Kaijin's thrall.

Right managed to find one of the missing Support Ressha while out in the woods, so he and Tokatti go out to find it. However, General Schwarz has been spying on the ToQgers and heads out to capture the Support Ressha for the Shadow Line.

After getting too emotionally involved in a ninja movie, Kagura accidentally breaks Hikari's kendama toy, and is worried about telling him. However, the Ressha stops at a new Dark Station where Hanko Shadow has made everyone lose their motivation, and Right, Tokatti, and Mio fall under his spell.

The signal from the lost Diesel Ressha is found, but because it is so weak there might be a chance it cannot work again. Right is sent out to find it, as his strong Imagination can restore it, but when the Ressha's brakes are discovered to be broken, everyone fears that the Shadow Line has planted a bomb on them.

While the Ressha are under maintenance from the previous battle, the group uses the Support Ressha. At the next stop, Right wants to try a new buffet, but Mio meets someone apparently from her past who was in love with her.

After Tokatti meets a young man named Hiroki Fujisawa who seems to be unable to see the Ressha, Type Shadow sentences Tokatti to die at sunset.

While the ToQgers enjoy a day out at an amusement park, Right meets a young man with balloons who seems odd. Baron Nero leads an offensive against them in order to welcome the Emperor of Darkness onto the Shadow Line, and also has a particular interest in the man with the balloons.

Tokatti, Mio, Hikari, and Kagura can no longer see the Ressha and are seemingly devoid of their Imagination. Right tries to get through to them, but Lamp Shadow reveals to him that Zett has hypnotized all of them to forget their time on the Rainbow Line. Right must figure out how to get them back to normal, while also dealing with new memories of their childhood home.

A series of attacks from Kuliner Robos leaves the main Ressha in dire need of repairs, once again leaving the Support Ressha and Diesel-Oh all that the ToQgers can use. The Conductor warns them that they must find other Support Ressha in order to bolster the powers of Cho ToQ-Oh. While Right and Mio are out searching, Loupe Shadow appears, and throws Mio into a powerf...

While stopping at the next station, Right, Tokatti, Mio, and Kagura are all arrested for a crime they did not commit, because the cop who arrested them is incompetent. Hikari must now try to discover the true culprit and free his friends.

After it is revealed that Mio has the weakest Imagination of the group, they try to teach her how to improve her Imagination. However, the appearance of Hammer Shadow and the strange creature Mikey complicate plans.

Tokatti and Kagura uncover a Shadow Line plot to make children unusually happy, but Kagura must also deal with the young girl Aoi who says her brother has been kidnapped by the Kuliners taking children throughout the city.

The Conductor reveals that he has commissioned the transformation items for the sixth ToQger, and a Rainbow Line maintenance worker named Zaram, a former member of the Shadow Line, has been chosen to be ToQ 6gou. Right is sent to talk to him, but Zaram does not wish to be involved any further, particularly when he reveals his Shadow Creep form.

Although Zaram has left the Shadow Line and has become ToQ 6gou, he does not wish to remain with the ToQgers. When Ring Shadow traps people by putting rings with their names on their heads, Zaram, who should have eschewed his old Shadow name, must find a way to help the ToQgers and escape his former shackles as a Shadow.

While Tokatti is trying to befriend Akira, the Ressha gets trapped in a mine collapse orchestrated by a Kuliner Robo, forcing Tokatti and Akira to work together to find ToQ 6gou's personal Ressha.

Jack-in-the-Box Shadow's ability to send people flying away from him if they laugh affects all the ToQgers except Akira, leading the others to help Akira find his sense of humor or else he may be killed.

Sabão Shadow's ability to switch people's minds and bodies switches Gritta and Mio just as Gritta is to be married to Emperor Z.

Mio suddenly recovers a memory of their hometown, in that around this time of year they had a festival for the stars, and Right remembers as well. As they search for their hometown, the wedding of Emperor Z and Miss Gritta commences, and General Schwarz takes over the Ressha in the ToQgers' absence.

The ToQgers must defeat Gritta and Schwarz while trying to recover their memories of their long lost home town.

To find their hometown Subarugahama, Right and the others must move the Ressha onto the Shadow Line to free it from the darkness engulfing it, but the shadows engulfing the junction point keep them from using their powers.

In the next Shadow Town, the ToQgers come across various fictional characters, with Tokatti's favorite childhood superhero Ryo Knight appearing before him to encourage him, but all is not as it seems.

At the next stop, the ToQgers are perplexed to find Kuros but no Shadow Kaijin. However, Kagura and Akira discover that something odd is happening at the local public bath.

Right tries to use the Hyper Ressha to liberate the next Shadow Town, but his body cannot handle the strain. Elsewhere, new members of the Shadow Line appear.

Madame Noir uses her powers to turn Right against the ToQgers against each other, with Tokatti leading the group to get their friends back.

General Schwarz approaches the ToQgers so they can join forces to defeat Emperor Z.

Kagura regains a memory that it is Mio's birthday today and plans to bake her a cake and throw her a surprise party, but while she is baking the other ToQgers are attacked by Wig Shadow whose wigs will kill them once a bird hatches from a nest on the top of their heads.

The ToQgers travel to the Hyper Ressha Terminal to meet the Rainbow Line President, and Emperor of Darkness Z decides to take the opportunity to take over the terminal himself.

After the President of the Rainbow Line disbands the ToQgers, Right feels he is wrong and insists that he and the others continue the fight against the Shadow Line.

With their memories back, Right and Hikari must use their training in karate from Right's grandfather to defeat a Shadow Creep who has turned the people around the next Dark Station into his fighters, rather than Kuros.

While trying to battle Billiard Shadow, Mio is accosted by a man who has fallen in love with her. To avoid the man's affections, Mio says that Akira is her boyfriend, but this does not go down well with Tokatti.

With the Hyper Ressha Terminal occupied by the Shadow Line forces, the President decides to authorize the ToQgers to use all thirteen of their Ressha together to get it back, but first, they must get the Drill Ressha back from General Schwarz.

Hikari finds their old homeroom teacher is still alive, as she had left town to go to university, and he leads the others in protecting her from Fountain Pen Shadow's failure attack.

In the next Shadow Town, Keeper Knight forces the ToQgers to take a quiz, leaving Tokatti unsure of how he should answer due to being asked about Mio.

The Ressha stops at a station under the power of Film Shadow, leading the ToQgers to help produce a rival movie to defeat the monster.

With Christmas approaching, Imagination begins to run wild which makes the Shadow Line weaker. Right, however, realizes Akira is missing, while General Schwarz plans an offensive against Emperor Z and various defeated Shadow Creeps suddenly revive one after another.`

Akira, as Zaram, joins General Schwarz in his assault on Castle Terminal, but someone else gets the AppliChanger and attacks the ToQgers as ToQ 6gou.

Subarugahama is discovered to be kept under the Castle Terminal, leading Right and the others to attempt an assault on the castle in order to free their hometown.

Right wants to make an assault on Castle Terminal to free Subarugahama, but Akira and Mio realize that he is being too headstrong. Wagon reveals that she can deliver a letter for them, but it must contain their true feelings of things and Tokatti is not ready to commit to that.

When Doll House Shadow attacks the ToQgers, Hikari and Kagura are trapped inside its doll house which it will burn and kill them if they cannot find a way out or if the others cannot stop it.

Miss Gritta helps the ToQgers reach Castle Terminal to save their hometown, but Emperor Z still stands in their way.

The ToQgers have managed to free Subarugahama and Tokatti has figured out a way for them to become children again, but Right is not sure what to do after transforming into Dark ToQ 1gou in his fight with Emperor Z.

Akira stops Right from taking on Emperor Z as Dark ToQ 1gou on his own as he fears for his safety and promises to fight by Right's side. Elsewhere, Tokatti and the others, as children once more, go to their secret base and find something completely unexpected.

Having regained their memories, Tokatti, Hikari, Mio, and Kagura find Right, and, with Akira's help, dispel the darkness within their friend before they make a final stand to stop Emperor Z and the Shadow Line from shrouding the world in eternal darkness.