A fresh graduate, civil engineer Ludek Turna (Jirí Bartoska) decides on his future. Although he has agreed to leave with his fellow students to build a motorway, he accepts a job in a prestigious architecture office. His father, an important architect (Karel Höger) approves his decision. Soon after he joins the office, Ludek gets an individual task. He shall make a competition project of a sanatorium for miners in the Krusné Hory mountains He gets to work eagerly and he refuses advice of his father who leaves to Belgium for work. In the office they expect maliciously his failure, only designer Polda trusts Ludek unconditionally. But Ludek is unequal to this task. When the deadline approaches he finds in his father's rich documentation a similar project of a Canadian architect. He hands in this draft slightly modified as his own work.