Book 2 of 'The Stewards of Light' series, and sequel to 'My Science Teacher is a Wizard.' Blake Drywater and his fellow unfortunate students at Millard Fillmore Middle School once more find themselves facing an unexpected creature in one of their classes. Because of a sudden 'neck disorder' suffered by their math teacher, Blake and his classmates receive a chilling substitute. His name is Mr. Coagulate, who has a strange fascination with blood and dreams.
Meanwhile Blake's former science teacher, Mr. Marlin, uses his wizard skills to annoyingly turn himself into objects in Blake's classroom—objects that talk to Blake, but which no one else can hear. Mr. Marlin warns Blake that his substitute math teacher is actually a vampire, determined to enslave Blake and use him as an unwilling warrior in the battlefield of vampire nightmares. And in spite of Blake's best efforts to stay out of such a horrible place, he unwillingly finds himself in the midst of the vampire battle one night, where he learns that nothing ever works out the way it should.