A rare Celtic cross is stolen from Charlotte's aution house, after Lovejoy asked the porter to let a friend look at it. Charlotte and Lovejoy set out on the thief's trail and find themselves on a treasure hunt in the west of Wales. But they are not the only ones after the cross.Charlotte turns down Lovejoy's invitation to share a bedroom at a village inn.

Lovejoy meets distant cousins from America, who are visiting England. As well as a female ghost, old Lord Wakering has treasures which once belonged to Sir Walter Raleigh, and both Lovejoy and Mary-John Lovejoy, his American cousin, want them. Some of Lord Wakering's things are stolen, and Lovejoy travels in hot pursuit to the Carolinas, where he is not made welcome. Charlotte has to fly over to get him out of trouble.

Charlotte buys a painting from a hard-up couple, the Tabors, but finds she has been conned. Lovejoy decides to set matters straight.

A tough-talking business man hires Lovejoy to recover a sixteenth-century samurai sword which has been stolen from him. Another dealer, Lovejoy's mentor Jim Leonard, buys the sword at an auction, but it is promptly stolen from him by Joanna, the daughter of the original owner. Lovejoy stays on the trail.

Lovejoy is called in by Lord Dunwich to value a silver communion set, and Lady Dunwich wants him to find her some antique prints of the lost town of Dunwich-by-the-Sea (which is now under the sea). Charlie has done a moonlight flit, leaving his old dad in charge of Felsham Hall, and there are some unlikely characters around - a mad Greek priest, a Dutch civil servant, and a strange woman...