Gizmo is taken away from his home, imprisoned by a miserable circus, and introduced to magic by Sam's retired treasure hunter and magician grandpa.

Gizmo's newest batch escapes, and Sam is conflicted between protecting the Mogwai and returning to his usual life. An association with the street thief Elle complicates the decision even more.

The trust between Sam, Elle, and Gizmo is tested by a hungry supernatural stranger on a train.

When a raging storm forces her to seek shelter with Sam and Gizmo, Elle struggles to hide her past from her friends and an innkeeper.

Sam, Elle and Gizmo's nerves are tested as they follow Grandpa's map through the scariest woods they've ever encountered as soul-sucking, undead bureaucrats lurk in the darkness.

Upon arriving at the vibrant and bizarre Spirit Market, Sam and Elle must convince Gizmo that humans are inherently good; Riley Greene pursues Sam, Elle and Gizmo.