In far North Queensland, tanker driver Steve Hughes, is loading up for a supply run to remote clients who need fuel before the wet season cuts them off. At a Perth freight depot tempers are fraying. Husband and wife team, Gordo and Shui, have just finished a two-day non-stop drive but bad weather's caused them delays. Instead of resting at home, the boss has told them to turn around and do it all again. After driving for two days, Mark and Clare have arrived in Adelaide. But the only cargo they're worried about is Roy. He needs to get to a vet quickly.