In the mid-1950s, mayor Zwischenzahl is killed on the day of his inauguration in a West German town. The killer is Ruth Bodenheim, a Jewish woman, who wanted to avenge the death of her parents. Zwischenzahl, a former SA member, was apparently involved in the deportation of her parents to a concentration camp during the war. Ruth cannot bear the horrible events and the death of her parents and wants to open the eyes of the town′s residents.

In a casino in a West German health resort, one often sees Sybille - an attractive young student actress. With her winnings from the roulette table, she attempts to finance her studies. Despite a rather lucky streak, her winnings are a little on the lean side. She doesn't, however, gamble with her own money but with that of Dr. Busch, a lawyer, who likes to stay in the background with the argument that gambling houses are not the proper turf for a serious lawyer. From him, Sybille receives only a small share of her winnings later, and only through the intervention of Gerhard Fischer, a journalist, does Sybille come to realize her role in Dr. Busch's fraudulent scheme. Dr. Busch uses her to bring bogus chips in circulation, he wants to ruin the casino and eventually bring it under the control of a monopoly The journalist's attempt to make the deception known proves ultimately to be unsuccessful - the casino bosses have already informed each other and taken the appropriate steps. Nevertheless, Fischer and Sybille become a couple.