Bejewelled death

Stacey Orpington doesn't mind escorting the Orpington jewels from a Massachusetts museum the London exhibition where they'll be displayed. She's rather less keen on the hat box they're in, especially as a number of other plane passengers are carrying the same hat box with the same key. Then her hat box goes missing and the thief turns up dead, leading Stacey and her newly acquired companions on a hunt to find the right hat box before more people die.