Jungkook is a NASA mathematician. He and his husband Jimin have been planning for a child for some time now, and for a while, Jungkook's been working his steady job, figuring out math problems for other astronauts' trajectories. But one day, the astronaut that was previously assigned to go up on space, suddenly dies of unknown problems, causing the boss of NASA's operations to enlist Jungkook to go up. Jungkook's boss, Head of Trajectory, tells him that he's the only one who knows how to work everything on the ship. Will Jungkook live to see the end, or will space take away his life?