Stop All the Clocks :

Alex, a Chemistry teacher, believes she has found happiness at last in Nicholas. Yet, she has to compete for his affections with his daughter from a previous marriage. When she discovers he's thinking about remarrying his ex-wife to be closer to his daughter, she writes him a 'chose between us now' note. When Nicholas is suddenly and brutally murdered by an intruder and dies in her arms, Alex is treated as the prime suspect because of this note.She learns that Nicholas was involved in a financial scam and the police believe that she is party to this fraud. As Alex delves into the background of this scam, an evil cast of characters emerge including a man who is known as 'Psycho'. Why he was always heavily disguised when he appeared at syndicate meetings, who he was and why he relentlessly stalks Alex remains a mystery to the end. As Alex investigates the murder she is viewed as a threat, and thus a would-be victim of the remorseless Psycho.