Karuppasamy, a widowed night watchman, lives with his sister, Menmozhi, and three nephews – Veera, Mani and Murugan – in a small town in Tamil Nadu. One morning, while returning from his shift, he meets with an accident and breaks his hip. His panicked nephews want him to be operated on in town, but his somewhat more distant son, Senthil, takes him to his ancestral village to be treated by a traditional healer. Eight days later, Karuppasamy is dead. At his funeral, an old woman claims that Karuppasamy was murdered. Who killed Karuppasamy?