Sanjeevan, a police officer, who lives with his father and two sisters, falls in love with the police commissioner's daughter and gets married to her. Soon the girl starts creating problems in their life.

The threesome who lend reason to the title are Aravindan (Jayaram), Chandu (Mukesh) and Joy (Sreenivasan). They value friendship over everything else, even family, and for this reason, Chandu resists the advances of Aravindan's sister Uma (Divya Unni). When the trio take up a painter's job at a mansion, Aravindan falls in love with Padmini (Meena), who lives there and Padmini's jealous cousin makes him believe that his overtures are reciprocated. When the truth is revealed and Padmini rejects him outright, Chandu stands up for his friend and speaks ill of her. This makes her swear to separate the friends.

Vasu is brought up with love and care by his stepmother. However, when his stepmother gives birth to a boy, he feels insecure as the baby gets more attention than him.

Anandakkuttan, a junior artist in films, is forced to look after his brother who is autistic. Though unwilling and hesitant in the beginning, he soon develops a bond with his sibling.

Gokul Das, an ex-gangster tries to make a living by becoming the driver of a millionaire, whose daughter, Priya is the target of some killers. Das tries to save Priya, but things are not what they seem to appear.