Iru Dhuruvam

Inspector Viktor, an eagle-eyed police officer who has been going through a personal crisis, is assigned to investigate the homicide of Nivetha, a young, unmarried woman.

Viktor questions the victim's lover, Prabhakaran. He also finds a video recording on Nivetha's phone which leads him to a 'Thirukural' couplet.

The second victim is identified as Krishnamoorthy, an architect. Viktor gets a vital clue on the killer as he investigates further.

Previously, Viktor and his wife, Geetha, are seen having a heated argument that gets violent. At present, Viktor scours the city police records for killings in the past that match with the killer's MO.

The news about the serial killer is leaked to the press. Later, Viktor gets a cryptic warning from the killer before he can save his next victim.

Viktor and Kishore meet Prabhakaran's wife and Keerthana's friend, amongst others. They get a lead on a Red-coloured car that may belong to the killer.