They are trapped in a spaceship with no power. Outside there is no air and no heat. Earth spins 200 miles below. Three astronauts face a desperate situation in this spell-binding science fiction cliffhanger. After completing a daring mission in space, the three-man spaceship Ironman One orbits Earth preparing for re-entry. But a retro-rocket misfires, and the crew commander Jim Pruett, scientist-astronaut Clayton Stone and pilot Buzz Lloyd are marooned in space. Back on Earth, Charles Keith, chief of the manned space program, and senior astronaut Ted Dougherty plan an incredible rescue - while the whole world waits anxiously.