11 gay men and 1 straight man are locked in a house. The object for the gay men is to find out who isn't gay. Once a week someone gets outvoted, until 2 are left or the straight man is out. If the gays manage to outvote him, they win 1 million dollars. If the straight man is among the 2 last people in the house in the end, he wins 1 million dollars.
Now here's the twist: None of the men are actually gay, they just all think they are the one straight man.