Austin's opponent for Parliment, Seymore Pew is out of the race, due to the death of his father. Austin is once again engaged to Cynthia Dudcock, the bicycle clip heiress. Doctor McDuff find a new use for SBD, and Morris tries to steal the plans for the new trust flang from Jack Fairchild.

Isobel marries Lord Mountfast and Austin's engagement to Cynthia Dudcock is back on again. Doctor McDuff, whith encourgagment of Lady Patience, tries to get back the blackmail photos from Bradley's safe. A gun shot rings out throughout the house.

Inspector McDuff is called in to slove the crime of the Death of Lord Mountfast. Everyone is a suspect, but most of them have an alibi at the time. We also learn the deep dark secret of Charlotte.