An unlikely trio sets off for Monte Carlo to track down David's missing bribe money. Judith is forced to adopt an old cover, Debbie comes up with a very risky plan and neither of them know if they can trust Billy Donovan. Sam disappoints Queenie. Mrs. Williams is visited by a former colleague.

All roads converge in Geneva as everyone closes in on the stolen money. Judith discovers some unexpected guests, Interpol and the Albanians make their move, and romance blossoms. When the plan goes sideways, Judith and Debbie find themselves in mortal danger.