Nan-young is a scientist whose astronaut mother failed to return to Earth after things went wrong during her Mars probe mission. Nan-young has always dreamed of exploring space as well and longs to go to Mars, hoping to find a trace of her mom. Her dream comes true when she is selected as one of the astronauts for a Mars probe project. Before she blasts off, however, she meets Jay, a musician who also repairs retro sound instruments. This meeting happens thanks to an old turntable that Nan-young inherited from her mom.