An idyllic Shakespeare walk soon turns to disaster when one of the walkers is murdered and Frank becomes the prime suspect.

Lu and Frank return for a Christmassy mystery.  There is a dastardly plot to sabotage the Christmas festival. Now, it's up to Frank and Lu to find the culprit.. Frank and Lu are hired to unmask the 'Voice in the Dark' who threatens to destroy Wintermas, while Seb is faced with his first solo case.