Based on harrowing experience in the Arthur Road jail

When Mala Coutinho, the sole owner of a 200 year old Portugese villa is stabbed to death in her bed on the night of Christmas Eve, junior cop Sanket Salelkar, gets the first murder case of his career thanks to his boss being out of town. Pushed into a corner with his career under threat from his boss, Sanket convinces a very reluctant Sarla an ex-forensic investigator to help him solve the case by promising to get their over-inquisitive mother off her back.

Arnab tries to help Ruksahana, who is found under mysterious circumstances in a house. He lets her stay at his home until he discovers something strange about her.