It seems you're referring to the Tamil film (2004).
M. Kumaran isn't a gangster or a supercop. He's a son. A son trying to win back the one woman who never stopped loving him — his mother. m kumaran son of mahalakshmi movie
Not every hero fights with fists. Some fight with silence. Some fight with tears. It seems you're referring to the Tamil film (2004)
Here’s a concise deep post-style summary you can use or adapt: m kumaran son of mahalakshmi movie