On a foggy night in Amsterdam, a man falls from a rooftop to the wet pavement below. It's Alfie McQuinn, the notorious cat burglar, and he's dying. As sirens wail in the distance, Alfie manages to get out two last words to his young son, March: "Find jewels." But March learns that his father is not talking about a stash of loot. He's talking about Jules, the twin sister March never knew he had. No sooner than the two find each other, they're picked up by the police and sent to the world's worst orphanage. It's not prison, but it feels like it. March and Jules have no intention of staying put. They know their father's business inside and out, and they're tired of being pushed around. Just one good heist, and they'll live the life of riches and freedom most kids only dream about. Watch out! There are wild kids on the loose and a crime spree coming . . .

Never do a favor for a friend. Twelve-year-old March McQuin forgot rule number one for cat burglars, which is how he and his twin sister, Jules, found themselves dangling upside down twenty feet above a stone floor at three in the morning. Their target was a set of stunning diamonds and it should have been an easy job, in and out. Except another thief got there first. March and Jules were lucky to escape with their lives, and one measly stone. Now the botched heist has created a world of trouble. The stone they grabbed was the Morning Star, one of a trio of famous sapphires, and it's cursed. The theft put the twins and their friends in the crosshairs of Interpol, the FBI, and a vicious adult gang of international criminals. And worst of all, the only way to break the curse and set everything to rights is by somehow managing to steal the other two sapphires in the set. Break out the black gloves. Lay out the masks. There's a full moon coming, and jewels to steal...