Sigai

The film opens in Anna Nagar, introducing Prasath as a pimp who runs a coordinated operation for prostitutes. He maintains a tight, controlled network and shows unusual care for Buvana, treating her better than the others. This setup establishes the possessive world that drives the story.

One night, Santhosh asks Prasath for a girl. Chetta suggests Nimmi as a candidate, and Subramani is enlisted to drop her off at Santhosh's place. Nimmi's background remains hidden from her family, adding tension to the arrangement.

The following day, Prasath and Chetta realize Nimmi did not meet other clients and that Santhosh claims she left. They begin investigating across places to locate her. The mystery deepens as clues hint at something dangerous behind her disappearance.

They trace Nimmi's disappearance by following up with Subramani and eventually reach Santhosh's house, where they discover Santhosh dead and Nimmi missing. The case shifts from a simple disappearance to a likely murder. The trail grows cold, heightening the tension.

Chetta departs from Prasath and Subramani, and they head to KFC hoping for a fresh clue. The visit yields nothing, leaving them more puzzled. The investigation stalls as night approaches.

They return to Santhosh's house and find Nimmi dead, while Chetta has been caught. Prasath is left alone at the scene and spots a man crying on a nearby roof, suggesting the truth involves someone close to the case. The moment sets up a pivotal revelation.

The man on the roof identifies himself as Mathivanan, an NRI who visits India each year to meet Santhosh. He begins to recount the timeline, preparing to explain what happened that night. The narrative shifts toward Mathi's perspective and motives.

Nimmi seduces Mathi during a night when Santhosh is drunk in another room. She presses him to prove his control, and when he tries to end the encounter, she refuses to leave. Mathi ends up killing her accidentally, then mourns the act and finally reveals that he is transgender.

Mathi hides Nimmi's body in the fridge and tells Santhosh that she had left earlier. He attempts to cover up the incident and keep the truth from others as the web of lies tightens. The concealment marks a turning point in the crisis.

Santhosh discovers Nimmi's body and, sensing Mathi's true feelings, mocks him. In a tense moment, Mathi kills Santhosh accidentally. He hides the act as the situation spirals and the truth slips further away.

Prasath arrives at the scene just as the truth unravels, forcing Mathi to conceal himself and confront the pain of his transgender identity. He speaks of the isolation and fear he has endured. The incident marks the collapse of the characters' fragile lies.

A few months pass and Chetta adopts a stricter regime for his girls. Prasath renounces pimping after listening to Subramani and marries Buvana. Both characters attempt to start anew beyond the previous life.

Mathi begins living openly as a transgender person, with hints of growth and change. The film ends by presenting other transgender people, offering a closing message of visibility and acceptance. The final image underscores the film's focus on gender identity and resilience.