Murder committed at racetrack. One of the oldest riders, Lomakin, was found dead at the stall of his stallion Gladiator after the victory race. Death came from a blow with a hard sharp object to the temple. Colonel Turilin entrusts the search work in this case to Senior Lieutenant Lev Gurov, for whom it should become the first independent. ("Confession"). Police captain Lev Gurov leaves on a signal of an accident that killed a young woman. Almost immediately, it becomes apparent that the "accident" is an ineptly disguised murder. And here is Leva in an apartment with four suspects, each of whom has reasons not to love the murdered woman. And we must try to solve the murder in hot pursuit... ("Trap").