Finn's summer vacation plans didn't include leaving the planet. Whether surfing or snowboarding, Finn's up for any challenge. He loves racing and engineering for speed. Little sister Gabi dreams of becoming an astronaut, and being hard-of-hearing never slows her down. So both kids head to Kennedy Space Camp where Finn can design rockets and Gabi learns to pilot them. But a shocking countdown is ticking behind the scenes, and Gabi goes missing. Finn is determined to find her. As always, friends Axel and Burrito jump in to help him on his mission, out of the country and beyond. Lucky for Gabi, Finn will do anything and go anywhere to get her back--even the International Space Station. Don't miss the action of another high-velocity Finn adventure!