The game takes place in a post-apocalyptic world where humanity has been forced to abandon Earth after losing a war against monstrous creatures known as the Naytibas. In an effort to reclaim their home, Eve and her squad are deployed from the Colony to fight the Naytibas and retake Earth. Along the way, Eve encounters two survivors, Adam and Lily, and eventually settles in Xion, the last surviving human city on Earth. Eve then establishes contact with Orcal, an elder, and begins forming relationships with the residents of Xion, all in pursuit of her mission to save humanity and reclaim Earth.
