Ashley Davison, a graduate student in California, desperately wants to spend the holidays with her family in Seattle. Dashiell Tyler, a former army intelligence officer, receives a job in Seattle and must arrive by December 23. Though frantic to book a last-minute flight out of San Francisco, both are out of luck: Every flight is full, and there's only one rental car available. Ashley and Dash reluctantly decide to share the car, but neither anticipates...