As Gizmo is torn from his home and captured by a miserable circus, sheltered ten-year-old Sam Wing’s retired treasure-hunting grandpa introduces him to a whole new world of magic.

With Gizmo's newest batch on the loose, Sam is torn between his promise of keeping the Mogwai safe or returning to his normal life a choice that is complicated further by an alliance with street thief Elle.

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

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