The story starts with Ahana (Nargis Fakhri) rejecting the proposal of Karan of going to Paris (because Paris is so cliche or maybe budget didn’t allow) to go their summer house (that one mandatory creep house from every horror movie) in London.
They both reach there and as you expect Ahana starts unravelling some mysterious secrets about the house. They’ve their caretaker in Gotti (Ali Asgar) who as every trademarked caretaker of horror movies likes to follow ghosts. One fine night, he hears a lady singing a song in the house and he follows the voice to ask, “Kaun hai?” (Who’s there?). Amidst everything happening, we see a flashback sequence of Karan stuck in a love triangle situation with Maya (Navneet Kaur Dhillon) and Sameer (Vivan Bhatena). The ghosts of past attacks Karan, Ahana, Gotti and Karan’s psychiatrist Shivani (Mona Singh).