Rescued after hours in the freezing water clinging onto the wreckage of her yacht, Clara Conner wakes up in Dover hospital. Patrick, her husband, is missing, presumably killed by the explosion that tore the Connemara apart. Clara becomes convinced that Patrick was murdered and that she was attacked. As she sorts through Patrick's business affairs, she realizes that her husband had led a double life. He was involved with criminals and owed someone a lot of money. So when a mysterious man appears to be following Clara's every move, her fears for her safety grow - and that of her twelve-year-old son. Could this man be the attacker, and does he want to finish the job?