In Ratna's village, Reena and her boss learn about the cult of Karuppu Sami, the guardian deity and how Karuppu Sami punishes people who transgress his rules. While Reena's Chief believes it, due to him getting hold of some mysterious notebook with weird stuff and a sword which draws blood, every time it is taken out, Reena is skeptical about it. Eventually, they witness some mysterious and gruesome deaths. Simultaneously, the story of the Anaimudi Naicker's mother, the evil moneylender Pechi who indulges in usury is told in flashback through the eyes of Naicker's son and Ratna's older brother, the extremely soft and timid Rajendran who is obsessed with legends of Karuppu Sami. Pechi murders one of her opponents and is eventually killed herself, the first in a string of mysterious deaths attributed to Karuppu Sami. A few days later, strange events and sightings take place in the Anaimudi Naicker household, prompting Anaimudi Naicker's family to conclude that the house is haunted by Pechi's ghost and move out.