Hospital orderly Rozruch, denied his therapeutic treatment, is mistaken for Dr. Marek at the insurance office and sent to a spa. Councilor Pěna, plotting to wed his mistress after his daughter Heda’s marriage, also arrives. At the spa, impostures collide, identities are exposed, and hidden motives and loyalties come to light.

On the coast of Yugoslavia lives fisherman Ivo Kralj, his wife Marie, son Vuk, and Ivo's mother in one happy home. Marie, who loves her husband and always looks forward to his return from sea, attracts Nikola, with whom Ivo, out of jealousy, has a scuffle at a dance. After the outbreak of World War I Ivo is mobilized. He ends up in a P.O.W. camp where he is subjected to hard labour. His family then receives news of his death. The years pass and the lonely widow Marie is occasionally visited by her friend Nikola. Ivo's mother would like her to remarry. Soon after the wedding Marie becomes pregnant. Ivo, who has been thought dead, succeeds in escaping the P.O.W. camp where he has spent several years. Upon his arrival home he finds his name on a memorial erected to the victims of the war...

Adam Kavalír returns from abroad to take over the family factory from his father. But as a consequence of his father's bohemian lifestyle the business is so far in debt that the Kavalírs even lose their villa and must find a place to sublet. Mrs. Trojanová is no longer up to managing her pension, the co-owner of which is none other than her peevish daughter Eva, and she is looking for a capable manager. Adam applies for the position and is accepted.

Irča Miňovská, the daughter of a car factory director, meets mechanic Lexa Hora by chance. They fall in love, but Irča's father does not want his daughter's unequal relationship and decides to send Irča to a boarding school so that she cannot see Lexa. Lexa leaves the plans for her new engine with her boyfriend Harry Peters at the factory, resigns, and leaves to forget about Irča. Director Miňovský would like to produce a new type of engine, but Lexa is nowhere to be found...

Landlord Orlický has had three failed marriages. This experience has made him a sworn enemy of all women. Only old bachelors can work on his estate, and he forces his nephew and universal heir, Ríša, to the same fate. One day, however, the uncle discovers that Ríša is secretly seeing a girl, becomes angry, and decides to remove him from his will. He has a more suitable heir in reserve: the cabaret dancer and singer Ada Bártů, a descendant of his sister, who once married against her parents' will. She has not had any contact with her relatives for years, so the old man has no idea that Ada's supposed nephew is actually his energetic and enterprising niece...