The Gokaigers have fought Zangyack head-on. In order to quickly obtain the biggest treasure in the universe and escape from Earth, they have their navigation robot, Navi, tell them where the treasure is. However, the answer is vague: "Look for the man in black". With no other clues, they go down to Earth to look for it, when a boy in a school uniform calls out to them, saying he knows where the treasure is...