Frank and Luella are employed by lottery winner Leroy King convinced his son, Arty, who died 5 years earlier in a trainspotting accident is haunting him. His fiancee Katherine Courazon, a model, met him when she handed him the (pound) 36m lottery cheque 5 years earlier was convinced it was a prankster. Leroy and his son were part of a trainspotting group with Owen Faulconbridge and his son Eddie that met at Arden station. The two families had fallen out over a pact to share the lottery win. Sebastian goes undercover as a trainspotter while Frank and Luella stake out King's house and nearly catch an intruder. When Courazon falls from the footbridge and is nearly killed attention turns to guilt ridden Eddie but in the background is the young platform assistant who had a heart transplant 5 years earlier.
