Teesri Manzil

Teesri Manzil English Third Floor is a 1966 Bollywood musical thriller directed by Vijay Anand and produced by Nasir Hussain. It starred his regular actors Shammi Kapoor, Asha Parekh, along with Laxmi Chhaya, Premnath, Prem Chopra, Iftekhar, Helen, K. N. Singh and Salim Khan. The film became a bumper hit at the box office.

Sunita Asha Parekh lives along with her widowed father in rich neighborhood of Delhi. She deeply mourns the suicide of her older sister in Dehradun a year before and wants to take revenge for that. All she knows was Roopa committed suicide because she was cheated by her boyfriend Rocky. On the way to Dehradun she meets a charming but mischievous young man Anil Shammi Kapoor on train. Anil gets attracted by Sunitas beauty and spirit and decides to pursue her.Later he overhears Sunita saying that she would definitely take revenge on Rocky who was the cause of her sisters suicide. Anil himself was Rocky, he uses that as his stage name. He tells his version to his friend that he was never interested in Roopa and she was the one who always pursued him. She tells him that she would be coming to his floor and if he wouldnt open his door, she will jump from there and die. He thinks that she was just bluffing but when he hesitates to open the door, he hears her shriek. When he comes out to see, Roopa was already dead. ........

Source: Wikipedia