When Alfie McQuinn, the notorious jewel thief, is killed on a job, his last words to his son, March, are to "find jewels" and this instruction leads the boy to Jules, the twin sister he never knew he had--and the perfect partner to carry on the family business.

March and Jules are teenage twins, following in their father's footsteps as jewel thieves, but when their latest job goes wrong they end up with one jewel, a sapphire called the Morning Star, one of three cursed jewels--and the only way they can break the curse is to elude the FBI, Interpol, and a gang of international criminals, find the other two jewels, and reunite them.

Rule number one for cat burglars: Never do a favor for a friend. So why is March McQuin dangling upside down twenty feet above a stone floor in the middle of the night, instead of tucked into bed like a regular kid? Along with his twin sister Jules, he's set on stealing a set of stunning diamonds. It should have been an easy job, in and out. Except another thief got there first. March and Jules are lucky to escape with their lives and one measly stone....