Is Cassie Starkweather a crazed killer or a psychic savior? Wanted for murder, Cassie is an escaped mental patient who claims to have uncovered a vast supernatural invasion. As she fights a lonely war to keep the monsters and evil spirits from stealing innocent souls, one question haunts her: Are the creatures she fights real... or are they her own inner demons?

Cassie's big-top adventure concludes as she and Cisco are caught between the supernatural shapeshifters from Perdition and the world's most frightening freak-show. Plus: while Cassie walks a hair-raising high wire of horror, we catch our first glimpse of her ultimate foe... the Dark Lord of Perdition... the Adversary.