Before sunrise, Simon & Siouxie get an unusual call - snake on a train! Armed with grabsticks and flashlights, they run alongside the train in the dark, jumping over trenches and signaling gear to figure out how to safely rid the train of the snake before passengers board. Little do they know that the snake they're looking for has deadly venom that, drop for drop, is even more potent than the venom of a black mamba.