Museum employee Trofimov is studying the history of a strange artifact - a ring made of an unknown metal and with an unknown stone, which, according to legend, belonged to Judas and has magical properties. Meanwhile, life is in full swing in the criminal world: the thief Student dreams of stealing Monomakh’s hat, the raider Golovan is looking for the violator of the thieves’ law, the urkagan Lyuty, there is a brutal struggle for power - murders and “showdowns” follow one after another. And at the center of these events is the very ring that really significantly changes the fate of its owners. Several centuries ago, he brought the young sailor Francis Drake the glory of a cruel pirate, knighthood and an admiral's uniform, and finally, a painful death. Will crime bosses be happier?