Participants in a psychological experiment set out on a journey to reveal a real murder. The big game has begun: each of the seven has to play their role in the scenario devised by Professor Tronov, who invented this criminal charade. Dreamy, timid, envious, desperate—so different from one another, like the children’s rhyme characters—these are simply people who must outplay someone else’s rules. And do one more thing, even more difficult: defeat themselves.