As a new day begins in Arcadia, two trolls are fighting an epic battle with major consequences for the human world, and especially for one human boy in particular.

Still shocking from the discovery of the amulet's power, Jim meets his new teachers and learns that he's been given a sacred responsibility.

Jim and Toby tour Heartstone Trollmarket, where Jim begins his training. The presence of the first human Trollhunter doesn't go down well with everyone.

While Jim gets a crash course in troll history, big problems, and a bully, await him in the human world.

Jim tries to get closer to Claire on a school field trip to the museum, only to learn that the museum's curator has an unpleasant secret.

Jim gets ready for an important rematch against Draal, the amulet's allegedly rightful heir. But their animosity gives way to a surprising partnership.