1952: Bishop Bilodeau visits a prison to hear the confession of Simon, a boyhood friend jailed for murder 40 years ago. However, once there, Bilodeau finds himself forced to watch a play put on by Simon and the other inmates depicting the two men's youths. As the play progresses, the tragic truth of Simon's crime comes to light.

At a maximum security prison, there is preparation for the annual party where entertainers and strippers are scheduled to perform. But not everyone is having fun. A man is sent to solitary, his wife has a nervous breakdown, and a convict prepares to make a daring escape.

La Cage seems to be divided into two parts: a homosexual writer visualises his fantasies and a collective joins what seems to be the story of an encounter between two men.

Identifying himself intimately with serial killer John Wayne Gacy, the director uses the camera to take hold of the actors, constructing fantasies that lead them to believe they are the victims in a film yet to be made. The young men, aged 19 to 26, speak from the heart about love and prostitution. Their search leads us into another world. Is this the world of John Wayne Gacy?