The twelve members of the Zodiac keep the Earth and the Heavens separated, restraining the other constellations, and keeping them from running amok. This is how it has worked without fail for eons, but a single strike brings everything crashing down. The seal that keeps the stars contained is broken, and they begin to fall to Earth. Introducing our two protagonists: Zanna, a human that adores space, now forced to confront the very constellations she used to gaze up at. Leo, one of the twelve Zodiac constellations, injured and confused after being knocked out of the sky.