Under an evil spell, The League of Freedom is transported to an apocalyptic future where American Ranger rules the U.S. under a dictatorship. While the heroes confront the horrors that await them in this future, they must help Robobot and Future Robobot fix the time machine needed to return home.

When rival gangs of werewolves and vampires get caught in an eternal war that only Black Saturn can end, Courtney is inadvertently transformed into a vampire. Rex and Ranger are determined to steer Black Saturn away from the dark arts while Robobot steers Lex toward a mindful meditation practice.