The Moon - Korea’s first manned mission to the moon ends in a tragic disaster when an explosion occurs on board. Seven years later, a second human spaceflight is launched successfully but a strong solar wind causes it to malfunction. One astronaut Sun-woo (DOH) is left stranded in space. Facing another fatal catastrophe, the Naro Space Center turns to its former managing director Dr. Kim (SUL) to help bring Sun-woo back home safely.