On a balmy June night, Kirsten, a young university student, is strolling home through a moonlit park when she is viciously attacked. When she awakens in the hospital, she has no recollection of that brutal night. But then details reveal themselves—dreams of two figures, one white and one black, hovering over her; snatches of a strange and haunting song; the unfamiliar texture of a rough and deadly hand. In another part of the country, Martha Browne arrives in a Yorkshire seaside town posing as an author doing research for a book. But her research is of a particularly macabre variety.

Detective P.T. Marsh was a rising star on the police force of Mason Falls, Georgia - until his wife and young son died in an accident. Since that night, he's lost the ability to see the line between smart moves and disastrous decisions. Such as when he agrees to help out a woman by confronting her abusive boyfriend. When the next morning he gets called to the scene of his newest murder case, he is stunned to arrive at the house of the very man he beat up the night before. He could swear the guy was alive when he left, but can he be sure?

Dr. Morton Handler practiced a strange brand of psychiatry. Among his specialties were fraud, extortion, and sexual manipulation. Handler paid for his sins when he was brutally murdered in his luxurious Pacific Palisades apartment. The police have no leads, but they do have one possible witness: seven-year-old Melody Quinn.

FBI Agent Nell Flynn hasn't been home in 10 years. Nell and her father, Homicide Detective Martin Flynn, have never had much of a relationship. When Martin Flynn dies in a motorcycle accident, Nell returns to the house she grew up in so that she can spread her father's ashes and close his estate. At the behest of her father's partner, Detective Lee Davis, Nell becomes involved in an investigation into the murders of two young women in Suffolk County. The further Nell digs, the more likely it seems to her that her father should be the prime suspect.

London cycle courier Astrid Bell has known most of her housemates for years, but while they have a tangled history together - romantic pairings, one-night stands, friendships - they each have secrets. Astrid is on her way home one day when her neighbor accidentally knocks her off her bike. Suffering a few bruises, her roommates help her home. The next day, they learn that same neighbor was bludgeoned to death only hours after the accident.