Zed is a hunter and Oh is a gatherer. After being informed that Zed ate from the Tree of Knowledge of Good and Evil, the shaman and Marlak banish him from the tribe. After Zed burns down the village by accident, Oh decides to go with Zed on his journey to discover all the world has to offer. Along the way, they encounter Cain and Abel. Cain kills Abel with a boulder in an act of rage and informs Zed and Oh that they must escape with him or else he will be accused of killing Abel.