Noah Gray, a commoner, earns a full scholarship to St. Cassian Academy, an elite school for nobles. On his first night, he discovers his roommate Damian Blackwood's secret: the cold wolf prince chains himself every bloodmoon to suppress his lycanthropy. Noah's blood can calm him. Secrets bind them, and affection blooms. The academy hides dark schemes. It selects sacrifices for a deadly ritual on bloodmoon nights. When Noah faces trial, Damian takes the mark for him. During the ritual, Noah awakens as the last heir of the extinct demon-hunter clan. The headmaster, Damian's uncle, murdered Noah's parents. He arranged their room for twenty years to use them as keys to unseal a demon. To protect Noah, Damian leaps into the abyss. Noah forms a sacred covenant. Their love becomes the permanent seal. The demon is banished. At dawn, Damian kneels and kisses Noah's palm.