Deenadayalan is an orphan raised by Mary. He starts with petty crimes and moves on to larger crimes as he grows older. He takes Muthukrishnan under his wing and eventually rises to become a feared, powerful don. Despite this, Deenadayalan has a strong sense of justice and is seen as a protector of the poor and underprivileged. His wife Lakshmi and daughter Radha are completely unaware of his illegal activities. But, as he faces betrayal from those close to him, his work begins to impact his family.