Ramya is mysteriously murdered at night through a blackening chemical injection. The case echoes the death of former ADGP Dhruv Guvarak’s daughter, Priya. Dhruv arrives from Mumbai to Chennai to unofficially take charge, joining hands with Inspector Shruthi and constable Kaali. Dhruv begins probing Ramya’s boyfriend, Karthik, a budding film photographer. A missing pendant from Ramya’s chain becomes a vital clue. CCTV reveals a hooded jogger near the scene. The investigation points to Tamilarivu, a swimmer with a criminal past and a photographic memory.
Tamilarivu is arrested and behaves erratically, chanting hymns and demanding pills. He reveals Ramya was once his lover, but she left him due to his refusal to abandon his sister. He denies killing her. His ability to recall memories under water becomes instrumental to the case. Through underwater memory recovery, Tamilarivu recalls glimpses of the crime. A pendant drawing leads them to CCTV footage that confirms his innocence. Dhruv, sharing his own painful past, convinces Tamilarivu to help solve the murder using his memory.
Clues lead Dhruv and his team to Kovilambakkam. A young blind girl’s account of an owl’s hoot and suspicion on drug cartels build tension. Tamilarivu’s sister briefly goes missing, and another murder—cosmetologist Dr. Shalini—occurs, raising the stakes.Vennila, a model and potential next
