Ruth (Gugu Mbatha-Raw), a woman with extraordinary abilities she can no longer control, is haunted by a mysterious past. Set in a broken and drought-ridden world, we meet Ruth on the run from an unknown group that has discovered her abilities. Ruth turns to the only place she feels she can hide: the childhood home she abandoned long ago. There, she reconnects with her estranged mother, Bo (Lorraine Toussaint), and daughter, Lila (Saniyya Sidney). As Bo attempts to help Ruth control her abilities, the three women start to become a family again. But when Ruth's pursuers catch up to her, she is forced to face her demons and confront her past.