In Chennai Files: Mudhal Pakkam, Prabhu (Vetri) arrives in Chennai to write about his father’s story, but soon finds himself drawn into a gripping murder investigation. Teaming up with police inspector Ramaiya (Thambi Ramaiah), Prabhu uses his inherited deductive skills to uncover the truth behind a string of mysterious killings. Alongside a determined female reporter, he delves deeper into the case — though the film’s attempt to mix suspense and comedy results in a shaky narrative, further weakened by an underwhelming villain.