The victim in the film is named Craig Owen, a successful businessman with no connection to the killer. He is abducted after a night out with friends and wakes up in the basement of the killer's house. The killer, known as "The Gemini," explains to Craig that he is tired of being the one in control and wants to switch roles, forcing Craig to become a sadistic killer and carry out his own capture, torture, and murder.
Craig initially refuses to participate but is subjected to brutal physical and mental torture until he agrees. The Gemini also forces Craig to confront and come to terms with his own inner demons and secrets.
As Craig's time in the basement progresses, he must find a way to outsmart The Gemini and escape before he becomes a permanent fixture in the killer's twisted game of role reversal.
The Basement is a psychological thriller that explores the complexities of the human mind and the lengths some will go to gain power and control.