Santhosh

Keshava Panicker (Madhu), an honest engineer, has a lot of dreams for his son Unni (Mammootty), a medical student. But when Unni teams up with four of his rich and spoiled college mates, he falls into bad ways. To support his new lifestyle, he starts stealing money from his parents & accepting bribes from his dad's acquaintances. This enrages his dad who kicks him out of the house, leaving his mother Sridevi (Srividya) & his cousin/girlfriend Parvathi (Poornima Jayaram) torn between the two men.

Raju (Rahman), industrialist K. Krishna Menon's (Jose Prakash) problem child, gets a raw deal from his step-mom Sumathi (Shubha), after his mom's death & Menon's remarriage. When his girlfriend Rita cheats on him with Sumathi's son by her previous marriage, Ashok (Asokan), Raju snaps & bludgeons Rita, hospitalizing her in a coma. Fearful of the cops arresting Raju, Menon sends him away to Krishnagiri Estates, under the care of Menon's friend Madhavankutty (Mammootty) & his wife Prabha (Shobana).

Roughneck trucker Sreedharan (Murali) gets a raw deal from his selfish & womanizer assistant Ravi (Manoj K. Jayan), after Ravi woos & later dumps Sreedharan's mentor & father-figure Govindan's (Oduvil Unnikrishnan) daughter Radha (Suvarna Mathew). Later, Sreedharan tries to give a girl, Seetha (Parvathi), who gets orphaned because of him, a new life by marrying her, but Ravi had his own plans of getting Seetha for himself.

Unnikrishnan (Vinu Mohan) is just out jail, having served a sentence of 12 years, & is looking for revenge. The men who had conspired to destroy his family & his life & put him behind bars - D.I.G. Somasundaram, DySP Narayanan (Kollam Ajith), S.I. Rajan (Santhosh) & lawyer Chandradas (Kalasala Babu) - were still roaming free, & he starts knocking them off, one by one. Aiding Unnikrishnan in his mission was smuggler Masthan (Shankar), his old jail cellmate & himself an enemy of the coterie.