Season 1 of Kuruthi Kalam premiered on January 21, 2021.

An upright youngster, Vijay is pulled into their never-ending power play of two rival gangs with a history of violence rule the roost in Chennai and has to give up his hopes of becoming a police officer when he resorts to violence. As he rises in stature, his enemies also loom large, from his cold-blooded nemesis Kumar to his once-best-friend Sub Inspector Arun.