After the murder of their parents, young twins Thor and Rai are abandoned on Chimaera, a hostile planet where criminals are sent to die.

Though his brother is dead, Thor is not without companionship. According to the rules of the planet, Thor must become engaged to the irascible Tiz.

While searching for a hermit who may have valuable information, Thor crosses paths with Chen and finds himself in a formal duel for Tiz’s freedom.

The hermit Colin tells Thor the surprising details of the plot that led to his family’s death. If he is to take revenge, action must be swift - the deadly night is coming.

Manipulated into a duel to the death with the Ochre Ring’s Top, Thor is outmatched in nearly every way. Third has a plan to help even the odds.

After claiming the role of Ochre Ring Top, Thor discovers the Blanc Ring is on the move. Their leader, Blanc Ro, isn’t interested in conquering the land - his only goal seems to be annihilation.