An unusual bond grows between 60-year-old Dalit worker Azhagan and eight-year-old middle class girl Radha. However, Azhagan's proximity to Radha and her mother doesn't go down well with Radha's father.

Gopi, an engineer, is found in his apartment, dead by hanging. Renuka, his fiancée, wants to uncover the reasons behind his suicide and decides to investigate.