Best friends Mel (Peyton List) and Jules (Cameron Goodman) are returning from a holiday in Mexico when they board an airport shuttle in the States. It's there they join two young men and an older business executive in what they believe to be a short journey home. But when the driver (Tony Curran) makes an unexpected detour into a dark and uninviting section of the city, it becomes clear the shuttle is taking its unwitting passengers somewhere else entirely.