When actress Lizzie Smith begins rehearsals for Macbeth, she's convinced the witches' spells are the cause of a run of terrible luck. Her bodyguard boyfriend, Leon, is offered the job of guarding the Scottish Diamond, a fabulous jewel from the country of Montverrier. But the diamond has a history of intrigue and bloody murder; and when Lizzie discovers she's being followed through the streets of Edinburgh, it seems her worst premonitions are about to come true ...