Ravi or "Bunnu" as he's called at home and Sandhya (Chandrakala) are childhood sweethearts despite Ravi being poor, and Sandhya being rich. Sandhya's father, who is a senior official in the Railways is posted to a distant location; Ravi and Sandhya are separated and out of contact. Many years later, Ravi has matured into a strapping young man. Not being rich or influential, Ravi finds it hard to find a job and decides to approach his friend Prakash (played by M. Rajan). Prakash is a happy-go-luck rich kid, whose family runs a large timber factory amid lush jungles, and is only too happy to hire Ravi at a generous salary (Rs.300 per month, although Ravi asks for only Rs.100).

At the behest of his father, Raj writes letters to Chandra, a prospective bride. However, unbeknownst to him, it is Neelu, Chandra's sister, who responds to his letters and falls in love with him.

Manjummel Boys, based on a real story, is about a bunch of friends who set out on a trip to Kodaikanal and the events that occur there.

A notorious gangster is incited to transform into a film hero and opts for a filmmaker and their project descends into a scenario they had never anticipated.