During a snowstorm, Toby is flagged down by Farmer McColl, whose sheep are due to give birth and urgently need a vet. At the next station, Toby explains and Duck and the vet set off for Farmer McColl's Field. However, even Duck's snowplough cannot cut through the snow and they are forced to retreat. Now, Toby must use his old line to save the lambs.

Gordon boasts about being the fastest engine on Sodor and Thomas wishes he was faster. He is given the job of taking a jet engine to Dryaw, but Cranky carelessly turns it on. Thomas rockets down the line, even passing Gordon.