In 2029, Korea's lunar probe Woori embarks on a historic journey to the moon, capturing global attention. Despite the mission's worldwide recognition, a sudden solar wind from a sunspot explosion strikes the probe, leaving Hwang Sun-woo isolated and adrift. Former Center Head Kim Jae-guk, who stepped down five years ago after the Narae incident, and NASA's General Director of manned lunar orbiter Yoon Moon-yeong are assigned to ensure his safe return. However, the path to bringing Sun-woo home is filled with challenges and obstacles. Undeterred, Jae-guk stakes everything, determined never to lose anyone again.