Bob Drifter is a substitute teacher with a secret. He seems like no more than a polite young man who loves to read and mentor students in his free time. Yet, on the side, Bob takes part in some rather strange extracurricular activities that soon attract the attention of local police. For some reason, people have a way of dying around him.   It's not his fault. Maybe he just hangs around people who are already dying. Maybe he has bad timing. But Bob knows better. He has a secret mission that must be completed before he ends up in prison or raises the ire of the most frightening individual in the supernatural world. No pressure.   A terrifying new force has set foot into Bob's life, and a string of ghastly mutilations follows this figure wherever he goes. Now, Bob has to keep his own secrets, protect his students, and fulfill his mentor's wishes. Welcome to the world of those who watch over the dead.