Padmanabhan has earned the nickname Budget as he is a miser. However, he struggles to save his father's house from money lenders as his wife is a spendthrift and never lets him save enough.

Nandakumar, a police officer, appoints Siva, a convict, to find and kill the terrorists responsible for a bomb blast. However, Siva is unaware that Nandakumar intends to kill him after the mission.

Karu is a Tamil drama starring Sai Pallavi and Naga Shourya and directed by A. L. Vijay.