After barely surviving the semester at the Royal Academy, Hiram Rho heads home for the summer and his department chair, Warren Oldham, departs on a well-deserved vacation. While Rho tries to get his powers back, Warren's vacation takes an unexpected turn that leaves him battling a demon from inside it. Back in Osyth Russell Cinea, the senior demonologist, is finally in charge - for a week full of demons, exorcists, and unexpected temptations.