It's hard to escape the secrets from the past. Storm clouds gather over Lily and Robert's summer when criminal mastermind the Jack of Diamonds appears. Jack is searching for the mysterious Moonlocket—but that's not the only thing he's after. Suddenly, dark secrets from Robert's past plunge him into danger. Jack is playing a cruel game that Robert is wrapped up in. Lily and Malkin, the mechanical fox, must stay one step ahead before Jack plays his final deadly card . . .