A real detective is always on the lookout—even on vacation. Friends-detectives Gurov and Kryachko had gone fishing when they happened to notice a suspicious man: it looked like someone had escaped from a monastery and taken something valuable with him. And they were right. The next morning, at the outskirts of Moscow, they found the body of that very fugitive—only the package he had been carrying was nowhere to be found. As the investigation showed, he really had been working at one of the monasteries, from which he stole an ancient book. That accidental thread led the detectives to a dangerous band of antique dealers. They had to hurry—catch everyone and interrogate them before the criminals managed to kill one another out of fear…