Delhi is rocked by a serial killer where 11 females have been killed in 12 months at Delhi's metro stations where the killer has removed the heart of the victim and left one of the playing card with symbol of heart on victims body.Shergill an investigating officer tells in media that he will solve the case within 12 hours they have nailed six suspects Abhimanyu,Santosh,Roshan,KKrish,Deepak and Tia but all the six suspects go missing. They all find themselves in a room where they've given 12 hours to find the real killer within themselves or face a certain death. Will they be able to do what Delhi Police has been trying for the last 12 months?