Fang & Claw
Alpha Chief Steve and an Omega, Bucky were a mated pair of lycans; mated since they were old enough to be allowed to in the White Star tribe. When Bucky went missing, a suspected victim of a vampire attack, Steve grieved over him and their broken bond. He was sure Bucky was dead.
Years later, Steve leads his pack on an assault against the vampire coven responsible for his mate's death.
Inside, they discover a dungeon where a vampire is being tortured.