Captured, Nicco and Luke are interrogated and forced to confront alternate versions of themselves. Heath and Jesse learn that their friends are imprisoned in a high-security facility and plan a breakout.

The gang contact Zeb and learn that one of them is the all-powerful Guardian of the multiverse and must travel to Negative Space to save theirs and all worlds from the Entity, the most powerful enemy they've ever faced. But who really is the Guardian?