Moushmi is accused of killing her best friend and roommate, but claims that it is a demon who made her do this, she is innocent. This demon has been following her since the day her sister passed away.

12 'o' Clock revolves around a young girl Gauri who starts getting traumatised with frightening nightmares and incidents of eerie sleepwalking. What follows to extricate her from the possession forms the crux of the story.