Typical Soviet "industrial drama" (or "production drama"). The handsome hero is a young man out of college, assigned to his first important engineering job in far-off Sibirsk. The hero tries to cope with serious industrial problems (some caused by his own carelessness), and in one case his old crane operator is seriously injured in a crane accident. At the same time the hero faces a romantic dilemma. He is torn between two loves, his current fiancée and his old flame, who shows up unexpectedly, still hoping to win him back. Many problems, many conflicts, subjecting the hero to a "sleepless night." Will he manage to resolve all his dilemmas?