Stealing dogs isn’t a very profitable business, but sometimes luck smiles: “dog thief” Shulgin found, in the pocket of a dog collar he’d stolen, a key to a bank safety deposit box. The dog belonged to some professor—clearly not a poor man—so there was something to profit from. The professor’s heirs are ready to buy the key for a very decent sum, but then some suspicious types appear too—also eager to get the professor’s money. All this criminal chaos would have lasted quite a while if two determined colonels—Lev Gurov and Stanislav Kryachko—hadn’t stepped in…