Plot summary

In the future American Midwest, where it has not rained for eight years, Ruth (Gugu Mbatha-Raw) is a homeless wanderer whose seizures trigger supernatural earthquakes. As she travels to her old family home, she meets Bill (Christopher Denham), a diner customer who is actually a scientist attempting to capture Ruth for study. Bill tricks her into accepting a ride with him then attempts to draw blood samples from her, but Ruth wounds him and flees in the direction of her home. Bill is forced to abandon his vehicle to seek medical aid, where it catches the attention of the local sheriff Ellis (David Strathairn).Arriving at the home, Ruth reunites with her mother Bo (Lorraine Toussaint), who has the ability to telekinetically disintegrate objects, reassemble them, and see vibrant flashes known as "the colors". Lila mentions it's also like an after effect. Bo has been taking care of Ruth's daughter Lila (Saniyya Sidney), who has the same powers as Bo and has no memories of her mother. After Ruth accidentally sets off another earthquake, Lila is introduced to her and they explain that Ruth's powers deteriorated in her childhood, becoming destructive and causing her to abandon her family.Lila and Bo attempt to train Ruth on reconnecting with her old powers, while the scientist and the sheriff investigate Ruth's trail. When Ellis discerns Ruth is back home, he covertly signals Bo, his longtime friend and lover, to warn her about the scientist that is searching for their daughter. The next morning, Bill begins heading for the women's house, and Ruth takes off in the family truck to escape him, leaving Bo and Lila behind. When she exits miles later for gasoline, her seizures return. Ruth relives the memory of her nearly drowning her then-infant daughter during a past episode, and then of saving her life, emotionally healing and causing the sky to rain again.Ruth returns home, where Ellis informs her that Bill and his accomplices kidnapped Lila. Ruth goes to rescue her, followed by Ellis and Bo. At the sheriff's office where Lila is being held, Ruth creates a storm and panics Bill and his guards. Bo offers herself to the scientists in exchange for Lila, who is reunited with her mother. The two escape in the truck, and find a note from Bo telling them to head for Rome to find another woman that she used to know with powers. (copied from Wikipedia)