For forty years, the Arcadia, once a luxury cruise ship, has been floating off the coast of what's left of America. Its residents are prohibited from leaving the ship, which has turned into a wild city at war with itself. Esther, a loyal citizen, has been training to become a medic, one of the only ways to leave the ship behind. Nik, a son of rebellion, desperately wants to liberate the ship. One thing is certain: the end of Arcadia is coming. But will it end in freedom or death?