This film tells the story of Loretta, a kind-hearted teacher, who marries Philander, one of America's top criminal psychologists. Cold-natured and obsessed with his work, Philander never shows his affection, leaving Loretta feeling deeply lonely throughout their three-year marriage. On their fourth wedding anniversary, she is brutally killed by a serial killer with a slit throat. Her soul lingers in the mortal world, silently staying by her husband's side.Philander takes charge of this serial murder case and analyzes the clues with his usual calmness. It is not until he realizes Loretta is missing that he discovers the victim is none other than his wife, dropping his cold facade completely. Overwhelmed by grief and rage, he tracks down the real culprit — Tatum Sullivan, the twin brother of a criminal he once convicted, who murdered Loretta out of revenge.After the case is solved, Philander falls into endless remorse. Reading Loretta's diary, he finally learns of her deep love and hidden sorrow. Consumed by guilt, he spends the rest of his life mourning his wife. The belated love ultimately turns into an irreversible lifelong regret.
