Danny is directing traffic on the road out of town when a driver, seemingly drunk, narrowly avoids him and crashes. The driver, a travelling salesman staying at a Ballarat hotel, is pronounced dead at the scene. But it turns out it wasn't the crash that killed him - someone had hidden a snake in his car. When Danny is bitten by the snake too, Blake faces a rush to both find the murderer and save Danny by identifying the snake and the antidote.