Thomas wants to deliver birthday presents to Alice, a young girl living at Hill Farm, and despite warnings of bad weather from Harold, he sets off to avoid an annoying new tank engine called Rosie. Thomas takes a difficult route that Rosie is unable to stand, but when he encounters a landslide he recklessly tries to push through and slips. Rosie, luckily, has managed to catch up to him and takes Thomas' trucks to Hill Farm, and to cheer Thomas up brings Alice down to visit him.
