A New York dealer in gemstones discovers a number of top quality synthetic diamonds in a batch he has bought. In order to find the source, and eliminate the threat to the market, industry watchdog, the FIDT calls in Belizian, Carter Jefferson to trace their origin. Old relationships are revived and family secrets emerge as an attractive English girl and a passionate young Frenchman are sucked into the web of deceit and death before Carter finally solves the mystery.