In a post-apocalyptic world composed of floating islands and shrouded in toxic energy called "entropy dust", time is not linear, but a commodity that can be distorted by the "temporal core" implanted in the body. Kai, a young scavenger, must find the legendary "Heart of Origin" that can reverse everything in order to save his sister who has been eroded by entropic dust and whose life is disappearing in "time". However, this heart is not only the only hope to cure his sister, but also the ultimate power that the ruling class "Parliament of Law" desires to control. It is also a taboo object that the fanatical "Unionizer" sect vows to destroy. Kai's journey will be to uncover the truth about the collapse of the world in pursuit and escape, and finally make a choice between saving his loved one and saving the world that can tear apart time itself.
