Tulip, a headstrong 13-year-old girl, finds a mysterious train where every car contains its own universe.

Tulip, Atticus and One-One enter a crystal forest car and have to take part in a musical ritual.

The gang meets a familiar face in a mirrored car.

Tulip makes it to the front of the train and is faced with a choice.

Mirror Tulip and Jesse climb down a real life family tree.

Mirror Tulip and Jesse enter a carnival car and have to compete for the exit.

Mirror Tulip finds herself in the wasteland outside the train.

The gang's uneasy alliance is tested by a challenge in their first car together: dancing in a high-stakes octopus debutante ball!