What will you do if, upon returning home and jingling your keys cheerfully, you find a thief in a dark corridor? Tanya simply tripped up the fleeing shadow. Well, fair and effective! But for some reason, the skinny raider, clumsily sprawled on the floor, shows no signs of life... Tatyana Ivanova is a private detective and has met death many times. However, to put down an ill-fated burglar in your own house... Now go and prove that everything happened by accident! Moreover, the event itself was the beginning of a whole series of mysterious deaths, occurring for some reason exactly where Tatyana appeared...