 In the episode, the Trotters search for the hidden gold legacy of Freddie "The Frog" Robdal, an old friend of their mother's.Del Boy, Rodney and Albert go to Hampshire to attend the wedding of Trigger's niece, Lisa, who appeared in the episode "Tea for Three".Whilst there, Trigger's Aunt Reenie Turpin (Joan Sims) tells Del about a local gentleman thief, Freddie "The Frog" Robdal, from the early 1960s.