No good can come of Ataru and Ten switching bodies, nor using Lum’s shortcut to get to school on time.

Shinobu, Lum, and Ataru take an unexpected trip to the future. The good news is they discover who their spouses are. The bad news is their disappointment is immeasurable.

The trio are determined to find their ideal futures, but each one they find leave them unsatisfied. And Inaba’s coworkers are not happy with the group’s meddling.