Joyce Mildmay's life is torn apart when her husband Charlie is killed in a tragic yachting accident. Though financially secure, Joyce is left to raise their three children by herself. Six months later a mysterious letter arrives on her doorstep which turns her world upside down. The letter is from Charlie, delivered belatedly in the event of his death, and contains a sinister warning that Joyce's father, Henry Tanner, and the family business are not as they seem. Alarmed by this message from beyond the grave, Joyce decides instead to stay and unearth the truth. But what she learns reveals a trail of intrigue and deception that stretches back through the years. It seems that death is just the beginning. . .