Set in mythical ancient Greece, the series revolves around Heron, the demigod son of Zeus, trying to save Olympus and Earth. Though Heron himself is an original character created exclusively for the series, the existence of such demigods born of the union between a god and a human is implied to be common in the original myths. The series claims in its prologue to be one of the tales "lost to history" rather than part of the current canon of Greek myths. It features gods, giants, demons, automata, titans, and mythical mounts from the original tales.