Evie is forever crossing swords with her twin. While she practises her after-school fencing, Tallulah is winning movie auditions. Neither of them could have imagined how their worlds would collide; but when Tallulah goes to Hollywood, Evie goes too - as her sister's identical stand-in. And everything changes when the film needs some all-action sword-play. Now Evie's the one enjoying the limelight - that is, until Tallulah goes missing . . .