In this world, everyone is at war at sea. Each team has a captain, captains that fight to the death just to get their positions. The teams have people born into this, saved or claimed. Claiming is marking your territory as yours, only captains can do this, once that captain dies, the other captain gets the territory. The captain can choose to save or kill the people. The people all have marks somewhere on their body, it's rare to see someone without a mark. All anyone cares about is treasure...