The nice men at P&O are worried. A succession of jewelry thefts from first class passengers is hardly the best advertisement for their cruise liners, particularly when it is likely that it is a passenger who is doing the stealing. Phryne Fisher, with her Lulu bob, green eyes, Cupid's bow lips and Chanel travelling suits, is exactly the sort of elegant sleuth to take on a ring of jewelry thieves aboard the high seas, or at least, aboard the SS Hinemoa on a luxury cruise to New Zealand.