The action takes place in Poland in 1971. In the Warsaw suburb of Bródno, an old watchmaker is killed in his apartment by a single shot. He led a secluded life and had no friends or relatives. Captain Korda, who arrives at the crime scene, cannot understand who would want the old man dead. But Korda notices a remarkable sign in the murdered man’s home — all the clocks (and there are very many of them in the apartment) have stopped at exactly eleven in the evening…