Poirot is ordered by his doctor to spend a few weeks at a health resort in Devon, on the grounds that he is too fat and out of condition, and Hastings comes along for a holiday. In Devon they meet an old acquaintance, the fashion designer Rosamund Darnley. Before too long another guest (the rich, troublesome and flirtatious Arlena Stuart) is found strangled on the beach, and Poirot begins an investigation which proves to be one of the most challenging of his career, with suspects abounding. However, the detective is greatly helped by the parallels between Arlena's murder and the unsolved killing of another rich young woman a few years before.moreless
Lovejoy takes Charlotte to an Antiques Fair at Cambridge, where the elderly Doncaster sisters, who have financial problems, invite him to value their belongings. Lovejoy finds what seems to be a very rare bible, but the sisters' brother, a Cambridge don, opposes its sale. Lovejoy then discovers the bible is a fake and suspects mischief.
Meanwhile, Beth's father wants her to leave Lovejoy Antiques for something better.