The protagonists in the love story are Vel (Ashok Kumar), a Hindu coming from a lower-middle-class family and a booking clerk at a lorry transport and cargo agency in Tuticorin and Manju (Vishakha Singh), a Roman Catholic girl, studying in the local college.

He shouts at Manju and her father Mariadas (Sampath Raj) who was riding the scooter, without realizing that he is the new customs officer at the local port with whom he has to interact due to the nature of his work.

Later she meets him and sends him a note to take a head scan, which leads to hilarious scenes as his assistant 'Tyre' (Ganja Karuppu) thinks it is a love letter.

A distraught and drunk Vel on the advice of Tyre and other lorry drivers go to her house in the night asking for her hand, which leads to bedlam.

Three days later, a sobered Vel goes to her house to apologise and finds that they have left town and Mariadas has resigned from customs and just disappeared.

[5] A critic from Sify wrote "What makes Pidichirukku work is the simple narrative and the love between the lead pair is established in a way that is believable at the same time enjoyable.