Marcus (Xavier Samuel), his best friend Craig (Bobby Morley), and their friends, Liz (Georgina Haig) and Nina (Sophie Lowe) are driving through the Australian outback, when a road train comes up behind their SUV and pushes them off the road, breaking Craig's arm. The truck stops some distance up the road. The group approach it, but the driver is nowhere to be found. Distant gunshots are heard, and a crazed figure in the bush screams and runs towards them. Panicked, they commandeer the truck and drive away. The truck's radio turns on by itself. After all four fall asleep, the truck drives itself off the road and up a hill. When they wake up, Nina looks after Craig while Liz leaves to search for a shack she's seen. Unable to start the truck, Marcus accompanies Liz.