It seems like there's nothing special about someone having the same sneakers as you? What if these sneakers are the only evidence that can be used to find the criminal? And in general, make sure that he exists, because in the new case that Romka and Leshka are investigating, a real invisible man appears. It is he who continually wanders around the apartment of the old woman Sofia Yakovlevna, heiress of the legendary Jacob Bruce, in search of ancient treasures. He opens a locked door, rummages through books and flower pots, and then... disappears to God knows where! It’s good that Romka managed to get a print of his footprint. Now the criminal needs to be identified...