Fiona is set to tie the knot with her dashing captain Archie Somersby. But while Fiona is busy planning her happily ever after side-kick Kitty Lane and a group of judo-chopping suffragettes are kicking up trouble at the Piccadilly Jujitsu Club. When Kitty is found unconscious in the locker room during a high-stakes competition Fiona must forsake her bouquets and bridal gown to investigate. Her sleuthing leads to a posh lady's luncheon where a mysterious death crashes Fiona's wedding plans. To make matters worse the arch-nemesis of all things matrimonial Fredrick Fredricks is up to his old tricks attempting to put the brakes on Fiona's journey down the aisle. Will he succeed in tripping up Fiona's wedding vows? Or will she finally say 'I don't' to the charming devil?