Jade, a headstrong young woman, lives in an irradiated wasteland. She struggles each day to protect her younger sister Pearl, a sweet girl who was born mutated. Their life is tough, but Jade is determined to survive.
One day, Jade returns from a supply run and finds her sister missing. She knows one of two groups is to blame: the fascist society that lives underground, scorning the sun and all mutants, or a fellow scavenger on the surface, acting out of depravity or desperation.
Jade is willing to risk everything to save Pearl, including her own life and morals. With her gas mask fixed tight, and a heavy chain in hand, she sets off on a mission of vengeance. If she fails, Pearl will die.