The movie is about a woman, Mrs. Stevenson, who is wealthy but mentally ill. She tries to dial her husband's number but she overhears a conversation instead. She figures out that there is going to be a murder at 11:15 and is even more disturbed. She stills strives to reach her husband and talk to all the people he knows. Her phone keeps ringing and is getting more worried until 11:15 the murder happens. Someone is in the house and she doesn't know how to react. She gets her final call from her husband and her tells her to go to the window and scream as loud as she can. However, she doesn't make it in time. We learn that Mr. Stevenson, her husband, was a part of the murder and he killed his wife only for the money, which he regrets.