PART 1: "I'M JUST WARMING UP"
There’s a new kind of crisis threatening the heroes of the DC Universe. How does a superhero handle PTSD? 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 Superman, Wonder Woman and Batman to investigate—but can they get the job done in the face of overwhelming opposition?