In the near future, South Korea’s first manned mission to the moon ends in a tragic disaster when an explosion occurs on board. Five years later, a second human spaceflight is launched successfully but an unexpected solar flare causes it to malfunction. Two astronauts are killed, but lunar survivor Sun-woo is left stranded in the cosmos. Unfortunately he doesn’t know how to control the spacecraft making the staff at the Naro Space Centre very nervous indeed. As they can’t afford another fatal catastrophe, they turn to former managing director Kim Jae-guk to help bring Sun-woo back home safely.