After losing his mother in a young age and becoming a victim of torture in the hands of his step-mother, Adithya Menon is now a psychiatrist. He, who doesn't like woman in general, owns a clinic where he traps and tortures young couples who come to him for guidance. The lead couple Rafee and Meenakshi also fall for the treatment of Adithya and in due course, figures out that a number of people who are kept captive by Adithya die due to unknown reasons.
Meanwhile, under Pandiarajan, a police team assembles to find the missing couples. Will Adithya get caught for his wrong doings? Those who are held captive is killed by whom? The rest of the story answers these questions.
Debut actor Rafee has two heroines in this flick. Being a serious character, he mouths a couple of strong dialogues. He also have duets with both the heroines. But he struggles with his acting. After playing a homely role in Karuppusamy Kuththagaithaarar, Meenakshi plays a glamourous role in this flick. Though it's a shocking makeover it's hard to digest her acting. Meera Nandan comes in a flashback sequence without much scope and her acting too is only fairly decent.
As a psycho villain, Adithya fails to make an impression because of his careless acting. It's apparent that the director hasn't gotten the best from the villain. Along with his team, veteran actor Pandiarajan's comedy track doesn't provide a comical break required for a thriller.
Murali Krishna, who was behind love films such as Parvai Ondre Pothume and Pesatha Kannum Pesuma has directed this film too. With twist after twist, the director has scripted a film that's well suited for the current generation. But the director has failed in directing, casting and sqeezing the work from them. Jagadeesh Viswam could've been better, so is Murali Krishna's music.
Overall, Nermugam could've been straighter.