Four thugs play poker with their own dealer on a regular basis. While covertly playing a game of cards at night, none of them ever believed anything awful would occur, yet one night something terrible unfolds.
Zoltai is a Hungarian professor who returns home after a visit to the United States. Following a television interview, he commits suicide and leaves a note for his longtime friend Dr. Bardocz. The doctor and Zoltai's colleague Komindi join the police in investigating what drove the man to suicide.