When Harry Lambert's signal is seen to be on fire, Ethel, Jack and Wilfred attempt to put matters right, but it only leads to them causing a small fire on the platform. Mr Parkin mischievously buys a set of expensive lingerie for May, for the eighteen birthdays she has had since they last met. May thinks that the only thing she can do is give them back, but she wishes she didn't have to. Jack gets wind of the present when Vera Plumtree, the station cleaner, seemingly accidentally lets it slip. Jack demands to know what is happening, but Ethel spins a story and Jack is convinced it was innocent. He insists that May comes home with him for a bit of hanky-panky, and Wilfred and Ethel have to deal with an unexpected arrival of a lion at the station.