It's 1956 and fifteen-year-old Betty Broadbent has never left the Cornish fishing village of St Steele or ventured far beyond the walls of the boarding house run by her erratic mother. But when the London press pack descends to report on a series of gruesome murders of young women, Betty's world changes. In particular she is transfixed by mysterious and aloof reporter, Mr Gallagher. As the death toll rises, an unlikely friendship blossoms between Betty and Gallagher. But as their bond deepens, they find themselves entangled with the murders and each is forced to make a devastating choice, one that will shape their own lives - and the life of an innocent man - forever.