When a painting vanishes from a maritime museum - and a dead body is found nearby - the newly established Lockwood Antique Hunter's Agency, Freya Lockwood and her Aunt Carole, are called to investigate.

Following a lead that takes them aboard a glamorous antiques cruise sailing toward the Red Sea in Jordan, they quickly discover that the ship's art gallery is filled with stolen antiquities. Each and every one of them is also listed in Freya's late mentor's journals detailing unsolved cases.

In chasing a murderer with a stolen painting, they may have found something more sinister than they could've imagined. 

Their hunt soon turns deadly when they learn that the enigmatic and dangerous art trafficker named The Collector could be on board.

But on a ship full of antiques enthusiasts - plus some unexpected familiar faces - will Freya and Carole be able to discover The Collector's identity and stop his murderous plans before the ship docks?

Or will the killer strike again?