Frank tries to track down a runaway girl who is in town with the carnival. The cake tins are greased and the wooden spoons are poised as preparations get underway for the annual sponge cake competition. Cathy decides to enter the competition when she learns that Cris is the judge. Frank and Shirley try to help a runaway girl sort out her life when her boyfriend dies. The town, and Esme in particular, are astounded when Cathy wins the cake competition - but she did use a "secret" ingredient.