During a morning jog in the park, Artyom detains two juvenile delinquents — guys who robbed a passerby. Later it turns out how these two found potential victims, choosing an acquaintance for the role of "gunner".

The day after the funeral of the famous philatelist, two men in police uniforms come to his widow and take away a box with valuable stamps. They are particularly interested in Orange Mauritius. While the conversation continues in the hallway, the philatelist's grandson, sixth-grader Lenya, manages to replace the original stamp with an inept photocopy. In this form, the album with stamps gets to the false policemen...