Stranded on an alien world, an Earth-born martial artist finds himself in the crosshairs of a warrior woman determined to protect her people from mysterious "sky demons." As he dodges her blade and finally earns her trust, he discovers her world is reeling from a violent invasion that her people are ill-equipped to face. As they journey together across a hostile desert landscape, an unlikely alliance begins to form, but his every move is shadowed by a question: can they bridge the gap between them and fight back against a shared enemy?