When Mary receives a blank diary as a present, she thinks nothing of it. Until she opens the diary, and sees it's not blank after all ... 1st January MURDER LISA, OXFORD 1st February MURDER JANE, BIRMINGHAM 1st March MURDER DAVID, CARDIFF 1st April MURDER MARY, CHELTENHAM. Is this some kind of sick joke? But ... it's the end of January now. And a woman named Lisa was murdered in Oxford on 1st January. Does that mean there really is a killer out there, planning to commit a new murder on the first of each month? And is the Mary due to be killed on 1st April her? The clock is ticking for Mary to uncover the truth, before she becomes the next victim on the killer's list...