Sreeletha Namboothiri

Balan (Prem Nazir), an orphan brought up by Daniel (Balan K. Nair), is a hardworking Railway employee & gets promoted to the post of an engine driver, along with his best friend Raghavan (Jayan). He happened to rescue Savithri (Jayabharati) from some thugs & gives her shelter in his house. Daniel, who wanted Balan to marry his daughter Daisy, takes offense to this, & kicks Balan out of his house. Savithri turns out to be Raghavan's estranged wife & this causes friction between Balan & Raghavan.

When C.I.D. Chandran (Raghavan) is killed by a masked attacker, Central Intelligence Bureau (CIB) appoints C.I.D. Nazir (Prem Nazir), along with assistant Bhasi (Adoor Bhasi), to find the group behind the killing & bring them to justice.

Vishwanathan (Sreenivasan), an incorrupt village officer, is obsessed with making his son Manu (Vineeth Sreenivasan) an Engineer, sends him to a coaching center & always pressures him about it. Manu has no interest in being an Engineer & his mother Rema (Suhasini) is torn between the two men. When Manu doesn't pass the entrance test for the 3rd time in a row, father & son get into an argument after which Manu leaves home. Later, a drunk Vishwanathan goes missing, & is found, brutally beaten.

Dr. Balagopal (Mohanlal), a gynecologist at the Allied Hospital, tries to stop a group of terrorists who have planted bombs in 5 major cities in Kerala, & who have taken Home Minister Sakhriya Thomas (Shivaji Guruvayoor) & his new-born child, hostages.

Raju (Kamal Hassan), son of rich businessman Ambadi Rajasekharan Thampi (Thikkurisi Sukumaran Nair) & a Hindu, falls in love with & marries poor Christian working girl Elsa (Zarina Wahab), against both families' opposition. Elsa supports Raju, who was still a college student, through college till he gets his IAS & becomes a sub-collector, after which they had plans to start a family. However, their dreams are shattered when Elsa gets diagnosed with terminal leukemia.

Genius inventor Bharathan (Biju Menon) discovers a way to levitate objects using the power of nature, but starts to suffer amnesia about it soon after. As the scientists of the world look on, famed neuropsychiatrist G.R. Pandal (Suresh Gopi) is brought in from London to cure Bharathan. Pandal proposes a treatment, but which had the possible side effect of Bharathan forgetting his wife Geetha (Geethu Mohandas) completely. Initially opposed to the idea, Geetha is finally persuaded by Pandal.

Mary Hans (Seema) falls in love with a sailor Stanley Green (Mohan Sharma) & they plan to marry, but after learning that it was Stanley's sister Evelyn (Sreeletha Namboothiri), who drove her daddy to commit suicide & that Stanley was already a father to a girl, Mary drifts away from Stanley. Mary is raped by a stranger (Jayan), but she feels attached to him, even after learning that he was a brute. Pregnant with his child, Mary confesses her love for him, but is snubbed by the stranger.

An adaptation of the 'Sahitya Academy' award-winning play '18 Natakangal' by Jayaprakash Kuloor, the story is centered on man-woman relationships, which is weaved into a single story encapsulating the struggles of a filmmaker, exploring the different facets of the institution called marriage. It stars 10 lead actors, appearing as 5 couples, played by Jayasurya & Meghana Raj, Kunchacko Boban & Nithya Menon, Indrajith & Padmapriya, Shankar Ramakrishnan & Mythili, & Siddique & Ann Augustine.

Sunny (Kunchacko Boban), the new priest at the village church, gets wind of illicit activities at the hospital & old-age home run by local bigwig Vavachan (Hareesh Peradi) & his son (Krishna Kumar). As he was set to speak out against it, Vavachan hits first, accusing Sunny of having an affair with nun Sophie (Mia George). Sunny & Sophie both leave the church as a result, get married & starts a family. However, the issue doesn't die down, & Vavachan again turns his sights on them as a result.

An affluent couple - Paul & Sheela (Lena) - decides to return their adopted son Thommi (Gowri Shankar) back to the orphanage where they adopted him from, after the couple become pregnant with their own baby. Thommi's teacher & caregiver Jeelu (Ananya) tries to convince Paul & Sheela to keep the boy.

Vasuki Iyer (Nayanthara), a middle-class housewife & Kathakali artist, takes revenge on her rapists - 2 boys from the same apartment complex as hers, & a laborer who irons clothes for the apartment residents - with the help of DCP Jeena Bhai (Sheelu Abraham), who talks to her on the phone & gives help & advice.