In the near future, Korea`s first manned mission to the moon ends in a tragic disaster when an explosion occurs on board. 7 years later, a second human spaceflight is launched successfully but a strong solar wind causes it to malfunction. Astronaut Sun-Woo is left stranded in space. Facing another fatal catastrophe, the Naro Space Centre turns to its former managing director Dr Kim to help bring Sun-Woo back home safely.