Oleg Seredin managed to return home—back into the twenty-first century—to his apartment and to his old job and friends. But his life didn’t become calm and measured. It turns out that even now there are plenty of thieves and killers on the roads; in quiet forests there still live forest spirits and wolf-creatures; and in blue lakes there are mermaids and navis. All of them, for some reason, needed a coin brought by a wise man from a far-off past…