Jai Simha

Narasimha along with his just-born son moves to Kumbakonam and starts working as a driver. There, he comes across a corrupt cop and keeps fighting with him time and again. During one of the key problems involving the cop, Narasimha suddenly finds out that the cops wife is none other than his ex-girlfriend Gauri. Who is this Narasimha? Why did he come to Kumbakonam? What is his backstory with Gauri?