December 1935. Director Monty Harrison's production of A Christmas Carol has had a troubled run on its tour of regional theatres. With tensions amongst the cast running high the company reach their final stop - London's Theatre Royale. Catastrophe however strikes on opening night: Scrooge dies on stage the result (it is presumed) of a heart attack. But the show must go on. Until that is a leading theatre critic - and old rival of Monty's - is killed backstage. Are those associated with the production being picked off one by one? Budding journalist Daphne King takes up the case . . .