After being accepted into the capybara herd, Hoagie lives the easy life of catching worms, playing with young capybaras, and sunning with his best friend Katie. Still, he can't wait to go on another adventure. After trying to persuade Katie to travel with him, he falls asleep and when he awakes, Hoagie finds himself transported to space! Hoagie is relieved to discover that Katie is with him on this incredible space journey.
The two friends explore different planets, face danger, and meet aliens who think Katie is their queen. When Hoagie isn't allowed into her new kingdom, Katie has to decide whether to remain a pampered queen, or leave her throne behind!