A pseudo-modern world where people are seperated into two roles; Predators and preys. Everyone gets their roles within 24 hours after they are born. Predators get a red mark somewhere on their body and hunt prey and predators. Preys get a blue mark somewhere on their body and get hunted by the predators. The world is full of forests, swamps, deserts, lakes, oceans and so on, the Earth being bigger than Jupiter. (I am just testing things. Good luck surviving!)