In the shadowy depths of rural Tamil Nadu, where ancient superstitions clash with modern reality, Karuppu unravels a chilling tale of vengeance and folklore. The story follows a troubled young man who returns to his ancestral village after years away, only to discover that a malevolent entity known as the Karuppu has been terrorizing the local community, demanding blood sacrifices under the cover of darkness. As the body count rises and fear grips the villagers, the protagonist must confront his own haunted past and the dark secrets buried within his family's history. Directed with atmospheric tension by K. S. Ravikumar, this Tamil horror-thriller weaves together elements of supernatural dread and psychological suspense, anchored by a compelling performance from R. Sarathkumar as a skeptical police officer caught in the escalating nightmare. The film masterfully blurs the line between myth and reality, forcing its characters to question whether the Karuppu is a vengeful spirit or something far more human hiding behind the mask of legend. With its eerie visuals and mounting dread, Karuppu offers a gripping exploration of guilt, tradition, and the terrifying consequences of unresolved sins.