Kathy (Zoe Kazan) is driving her teenage daughter Lizzy (Ella Ballentine) to her father's house as it's his turn for custody. Tired of taking care of her abusive, unstable, alcoholic mother, Lizzy makes it clear she wants to live with her father permanently. As night falls, Kathy hits a wolf with her car. But its injuries look like they were sustained by an animal attack rather than their car. Kathy is injured in the collision, forcing Lizzy to call a tow truck and ambulance.

The tow truck arrives and its driver, Jesse, begins working underneath the car. Lizzy notices the wolf's body is gone and now becomes frightened. Tired with bickering, Kathy gets out of the car to talk to Jesse but cannot find him. Jesse's severed arm abruptly lands on the hood of the car.