[Machine Translation] 1 in 10 Belgians have seen it! An amazing super hit suspense! A secret room shared by five men. A dead woman in handcuffs. A trap set by the killer. You will be stunned by the ending! --Vincent, an architect with a loft room on the top floor of a newly built apartment, proposes to share the room with his friends Marnix, Luc, Chris, a psychiatrist, and Chris' brother-in-law, Philippe. The men used this room as a secret affair room without telling their wives or lovers. One morning, Luc enters the room to find a woman handcuffed to the bed and lying dead in a pool of blood. The five men gather in a panic and begin to search for the murderer, probing each other's alibis in front of the dead body...