An explosion rocked an ordinary apartment in a small town. The husband was killed, the wife sustained serious injuries, and the child miraculously survived. The police's version is that a moonshine distillery exploded in the apartment. However, Colonel Gurov and Kryachko from the Ministry of Internal Affairs discovered that the cause of the tragedy was a homemade explosive device of great destructive power packed in the casing of a smartphone that the wife found on the street. Is this someone’s cruel joke or a planned assassination? The detectives understand that to resort to such a step, one must have compelling reasons. For example, jealousy or… unrequited love…