In the fourth book of the fantasy saga “Mutangels,” the supermutant Rizengrі gets to one of the amazing planets—the Earth-4—where its residents all forget during the day what they did at night. Rizi must, on an assignment from the angels, find his friend Dyushka, but instead he meets a beauty, Elina—whose father, it seems, has managed to unravel a couple of cosmic secrets. But will Masha Malinina and Rino Sluns be able to uncover their own secret? After all, fate threw them into an even more astonishing place. And what will happen to Varya Voronina when she meets Prince Kirill? Perhaps the angels know the answers—or maybe it’s the one who turned into a rat: Leshcha Mymbe.