Welcome to Sanctuary, an ultra-secret hospital for superheroes who've been traumatized by crime-fighting and cosmic combat. But something goes inexplicably wrong when many patients wind up dead, with two well-known operators as the prime suspects: Harley Quinn and Booster Gold! It's up to the DC Trinity of Superman, Wonder Woman, and Batman to investigate--but can they get the job done in the face of overwhelming opposition? Superstar comics writer and former CIA operative Tom King (Batman, Mister Miracle) examines the potential long-lasting effects of saving the world in this groundbreaking new graphic novel with jaw-dropping art from the team of Clay Mann and Lee Weeks!