Helen (Jessica Morris, Role Models) and her twelve year-old daughter Lilly drive to the desert to get away from Hollywood. After squashing a rattlesnake under her wheels, another snake manages to slither into Helens car and bites her. Distracted by the painful wound, Helen crashes her car into a ditch. Now stranded in the desert with no phone or water, Helen and Lilly have no choice but to search for a doctor and safety. Yet, wherever they go, the snake follows quickly behind, patiently waiting for Helen to die. But why is the snake hunting them? And why is the Rattler not the only enemy who is after the two?