2Henry and Emmy Tibbett have been traveling (fans of the series know this is akin to saying that the sky is blue), but now they're headed back to England, on the ferry out of Harwich. It's a trip Emmy has been looking forward to, but her excitement flags somewhat when it becomes clear that the cabins are all spoken for, and that she and Henry will have to bed down in the "sleeping lounge," along with a motley collection of their fellow travelers. In the morning, one of those travelers is missing both his life and his fortune in Dutch diamonds. That's bad enough: No one wants to have snoozed next to a murderer But a few days later, when Emmy's unpacking at home, she makes a discovery that makes "bad enough" look awfully appealing. Now she and Henry are in real danger, and it will take their combined analytical skills to get them free of that terrible boat ride.