A 105 p. c. Alibi

On an early Sunday evening, people of the small town are reading lottery results that are hung on a board. Young man Karel Antoš is annoyed that his lottery-ticket missed the main prize, a car, by only one number. Karel is going to the pub to drink away his bad luck with his friend Jirka Brož. The old accountant auditor Zelinka drops a wallet. Karel picks it up and before he gives it back he notices the winning lottery-ticket in it. Both young men accompany the old drunk man. Karel steals the ticket and exchanges it with his own. Next day, Zelinka is found dead. Investigators, Captain Tůma and the Lieutenant Líbal, soon discover that this is a murder case covered up as an accident. Karel, who collected his prize, is arrested as the main suspect. More suspect circumstances come out including the account book with concealed deficiency from the hotel Černá růže which the hotel manager Batista tries to cover up. The girl shop assistant in the refreshment bar, Majka, the married Karel's lover dies of gas poisoning. This apparent suicide is in fact another murder. The real wrongdoer is soon convicted. The waiter Neumann, the lover of Zelinka's daughter Eva, killed the old accountant as well as inconvenient witness Majka, his ex-lover, who knew about the deficiency he made in the hotel. Karel and Jirka are only going to be punished for stealing the lottery-ticket.