 A man and woman posing as paramedics assists a man in an overturned car on a freeway.As an ambulance approaches, the woman panics, taping the man's mouth shut and pulling him from the car before speeding away.Meanwhile, single mother Senga and her 15-year-old daughter Natasha 'Nat' are on a six-hour overnight drive home, following a visit to Marek, Nat's father, for her birthday.