Corrupt police and politicians target a computer engineer for trying to better the lives of less privileged citizens.
Though he works as a hostel warden, there is more to Kaali than meets the eye. Things take an interesting turn when Kaali's path crosses with a group of dreaded gangsters.
Kaaliyan has a sister who marries a young man without the permission from Kaaliyan and moves to Kolkata with her husband , where she faces unknown threats. Soon her brother Kaaliyan comes to the rescue.
The movie is about a loyal servant, Muthu (Rajni), working for Zamindar Malayasimman (Sarath Babu) and the cunning plans by the uncle of Malasimman to capture the whole wealth which uncovers some mystery about Muthu.