On the planet Baab, dashing astronaut Scorch Supernova (Brendan Fraser) is a national hero and master of daring rescues. However, Scorch does not work alone; his nerdy brother, Gary (Rob Corddry), head of mission control at BASA, often lends quiet, behind-the-scenes support. When a distress signal arrives from a dangerous planet, Scorch ignores Gary's warnings and sets out on a rescue mission. Scorch soon finds himself caught in a trap set by an evil enemy, and it's up to Gary to save him.