Sylvia is tired from the events of the past day, and looking forward to a long sleep. Wander spends a long, tiring night trying to keep her from waking up due to the loud noises he keeps hearing.
Wander and Sylvia's spa day is cut short when a bunch of fleas have to flee their planet because a giant dog, Buster, has come back to attack it, assuming it's a ball, like what happened to the past ...