This house hides many secrets. Even the person who built it doesn’t know them all. Hidden passageways, basements—and most importantly, the cave that lies at its foundation, where a silver heart beats… the heart of a beast. No accidental people enter this house. The architect August Berg, the teacher Sofya, and Ilya—a boy who looks like a little wolf—are all gathered here for a reason. The house itself chose them and is preparing a separate trial for each of them.