Since inheriting a billion pounds and an earldom, Philip and Genevieve Warwick have lived as few can imagine: in luxury, traveling in style, hobnobbing with the global elite, and championing art worldwide. They have European estates, a château, a storied name, devoted staff—and even a family ghost.

But all is not Champagne and Chagalls.

When Baron Friedrich “Freddie” von Bassewitz invites the Warwicks to his Austrian Alps ski chalet—more castle than chalet—they expect friends, skiing, and art business. But they’ve barely unpacked when a vicious blizzard seals everyone inside.

Then Freddie, his wife, and the family patriarch begin behaving strangely. Just before the castle is cut off, Metropolitan Police DCI Francis Darlington asks Philip and Genevieve to trace priceless art stolen in a Boston heist thirty-five years ago.

Amid castle secrets, a suspicious aristocratic family, and a fortune in art missing from the Isabella Stewart Gardner Museum heist, the Warwicks must decide whether their invitation was innocent—and which guests they can trust.