Four-year-old Romochka is left alone in a dark, empty Moscow apartment. After a few days, hunger drives him outside, where he sees a large, yellow dog loping past & follows her to her lair on the outskirts of the city. During the seasons that follow, Romochka changes from a boy into something far wilder. He learns to see in the dark, attack enemies with tooth & claw, & understand the strict pack code. But when he begins to hunt in the city, the world of human beings, it is only a matter of time before the authorities take an interest.