The Inspectors Summers have tied the knot and embarked on their honeymoon in a small family-run hotel in Normandy. She has very definite ideas of what she wants out of a honeymoon: to set a seal on their love, and to form a foundation for life-long devotion. He just wants to nick a French police officer's kepi. He had a Bobby's helmet nicked from him once by a French girl while he was on crowd duty one New Year's Eve in London, and now he intends to return the favour. Neither is about to achieve their aim unless they can solve the mystery of the woman in the bath and the missing heroin. Which means pitting their minds against the French Inspectors Simenon. That's Mr and Mrs Simenon, whose marriage has gone beyond the rocks and is now beating itself to death against humdrum reality. One or either or both or neither could be the guilty crumpet. More importantly, is their marriage a portent of what could become of the Loonymooners? Ultimately the decisive question could well be: which side do the peas go?