After a long shift at the hospital and saving a 7-year-old's life, Dr. Anand looks forward to unwinding at home. An old friend's unexpected self invite causes Amudhan to welcome two uninvited guests- Vaishnavi and Padmini. However, is Dr. Anand claims who he is?
With unannounced guests and their constant chatter, Anand is close to annoyance. But with a cop's inquisitive questions in the picture, Anand decides to be at his best behavior. Who are the uninvited guests? Is Anand up to something?
Anand's fight to keep the truth from making its way out reveals a mysterious man bound in solitary confinement. A few flashbacks from the past reveal something shocking about Anand's history and character.
While Misbah and the others gain ground and release Avinash, a terrifying, mysterious man enters the scene and ruins their plans. But with all of them on alert, the doctor is trapped. Will the doctor take revenge on his survivors as per his plan?
Constantly tracking every single moment of all the survivors, Anand comes up with an elaborate plan to seek revenge on each one of them. Enraged and angry as ever over losing his life's work, Anand sets off on a terrifying spree. What lies in store for them all? Will they survive?