The Zak Hilditch-directed film, due out on Oct. 25, looks incredibly tense and sees Ejogo playing Katrina, a single mother driving cross country with her young daughter, Clara (Apollonia Pratt), in tow. Everything goes to hell when their car breaks down in the middle of a desert, and Clara wanders off into the brush while her mother changes a tire. The next thing she knows, Katrina hears her daughter screaming and soon discovers she's been bitten by a venomous rattlesnake.
In order to save her daughter, Katrina ends up going to extreme lengths when she accepts the help of a mysterious woman in the area who instantly heals the fatal bite. But the good deed comes at a steep price