Jim Lake had a good life. Until he found an amulet and became the first human Trollhunter. But he has friends, Toby and Claire that are helping him and two great tutors. Until new classmate comes to school and things start to get weird. Mr. Strickler is affraid of something, Bular isn't the killing machine he used to be, Blinky, Aaarrrgh and Vendel are dreading something and their new classmate is acting weird.