In a world threatened by the imminent death of its sun, young Yama lives a relatively happy and peaceful life as the daughter of the chief of the village. But everything changes the day a sword of glass falls from the sky, as prophesied. Anyone who touches the sword is instantly turned to glass and dies. Orland, the local warlord, comes to the village to seize the unique weapon, but fails, and in the process Yama's father and mother die. Yama, however, escapes and survives with only one thought: to retrieve the sword of glass, and avenge the death of her parents.