John D'Soza is a serial killer who marries wealthy single mothers for their money. Once the women discover his true nature, he kills the entire family, steals their wealth, and disappears. After his latest killing, he changes his name to Arvind and goes on the run but is involved in a traffic accident.
Lakshmi is a single mother and billionaire businesswoman who owns a large conglomerate, including a tea factory. A wild tiger has been roaming the nearby forest, attacking some of her factory workers and terrorizing the area. Arvind approaches Lakshmi. By playing the role of a kind and caring man, he successfully befriends Lakshmi, who then appoints him as her factory manager.
A flashback reveals that after his accident, Arvind (then still John) woke up in the home of Subadhra, who introduced herself as his neighbor. She showed him video footage of him killing his previous family, and revealed that she is Lakshmi's estranged sister. Due to her reckless lifestyle, their father had disowned her and made Lakshmi the sole heir to the family business. Subadhra blackmails John, demanding that he kill Lakshmi in exchange for keeping his secret. This was his true motive for approaching her.
Lakshmi later falls in love with Arvind and marries him, then promotes him to managing director, granting him partial inheritance rights to the business. However, Subadhra grows impatient that Lakshmi is still alive. Meeting Arvind at a hotel, she is told that Lakshmi's wealth is far greater than they had estimated. Arvind proposes killing her only after gaining full control of the business, promising to make Subadhra his partner. Intoxicated and under the influence of drugs, Subadhra reveals that the memory card containing the incriminating footage is hidden beneath the skin of her abdomen. Arvind kills her and retrieves the card.
Sometime later, Arvind sees a TV news report that police have solved his previous murder case and identified him. Panicking, he accidentally signs a cheque using his old name, “John,” instead of “Arvind.” Lakshmi's secretary notices the mistake and, along with other suspicious clues, begins to suspect criminal activity. She blackmails Arvind for 50% of his illicit earnings. Arvind murders her.
The secretary's murder is investigated by police officer Vijay, Lakshmi's close friend. Vijay finds the cheque in her bra and, confused by the unfamiliar name, investigates further. He concludes that Arvind is the prime suspect and calls Lakshmi, asking her to keep him at the house until he arrives. However, Arvind has been secretly tapping Lakshmi's phone and learns of the plan.
While Vijay is still on the way, Arvind attacks Lakshmi and her sister. He injects anesthesia to them and confesses his whole story to them. He then releases the tiger, which he reveals that he captured earlier using Subadhra's body as bait, into the house and locks it from outside. The tiger does not attack them at first, which gives them time to wake up and run.
The film then enters its climax with Lakshmi, Nithya, and Lakshmi's daughter Mithoo trying to hide from a roaming tiger in a sealed house.
Outside the house, Arvind stops Vijay and the two engage in a fight. Arvind kills Vijay.
After a few hours, Arvind goes back to the house to check the situation. He sees Lakshmi lying in blood on the floor, believing that the tiger has killed her, so he opens the door. However, it is revealed that Lakshmi is not dead, but injured. She rises and fights with Arvind. Just then, the tiger attacks kills Arvind. Lakshmi uses this chance to escape with Nithya and Mithoo.
