NYPD detective Jacob Kanon is on a tour of Europe's most gorgeous cities. But the sights aren't what draw him - he sees each museum, each cathedral, and each cafe through the eyes of his daughter's killer. Kanon's daughter, Kimmy, and her boyfriend were murdered while on vacation in Rome. Since then, young couples in Paris, Copenhagen, Frankfurt, and Stockholm have been found dead. Little connects the murders other than a postcard to the local newspaper that precedes each new victim.

It is midnight on the morning of Halloween, and Jen anxiously waits up for her 18-year-old son, Todd, to return home. But worries about his broken curfew transform into something much more dangerous when Todd finally emerges from the darkness. As Jen watches through the window, she sees her funny, seemingly happy teenage son stab a total stranger.

Imagine that your husband wrote you a letter, to be opened after his death. Imagine, too, that the letter contains his deepest, darkest secret - something with the potential to destroy not just the life you built together, but the lives of others as well. Imagine, then, that you stumble across that letter while your husband is still very much alive....

When a young boy discovers the body of a woman beneath a thick sheet of ice in a South London park, Detective Erika Foster is called in to lead the murder investigation. The victim, a beautiful young socialite, appeared to have the perfect life. Yet when Erika begins to dig deeper, she starts to connect the dots between the murder and the killings of three prostitutes, all found strangled, hands bound, and dumped in water around London.

When a woman's body is discovered in a cathedral and hours later a young man is found hanging from a tree outside his home, Detective Lottie Parker is called in to lead the investigation. Both bodies have the same distinctive tattoo clumsily inscribed on their legs. It's clear the pair are connected, but how? The trail leads Lottie to St Angela's, a former children's home, with a dark connection to her own family history. Suddenly the case just got personal.

Every morning and evening, Zoe Walker takes the same route to the train station, waits at a certain place on the platform, finds her favorite spot in the car, never suspecting that someone is watching her. It all starts with a classified ad. During her commute home one night, while glancing through her local paper, Zoe sees her own face staring back at her - a grainy photo along with a phone number and a listing for a website called FindTheOne.com.

Twenty years ago, Melanie Stokes was abandoned in a Boston hospital, then adopted by a wealthy young couple. Gifted with loving parents, a doting brother, and an indulgent uncle, Melanie has always considered herself lucky. Until the first cryptic, threatening note arrives: “You Get What You Deserve.” Melanie has no memory of her life before the adoption. Now someone wants her to remember it all - even the darkest nightmare the Stokes family ever faced: the murder of their first daughter.

You think you know the truth about the people you love. But one discovery can change everything.... Eight-year-old Billy goes missing one day, out flying his kite with his sister Rose. Two days later he is found dead. Sixteen years on, Rose still blames herself for Billy's death. How could she have failed to protect her little brother? Rose has never fully recovered from the trauma, and one of the few people she trusts is her neighbour Ronnie, who she has known all her life.

Twenty years ago, Jane Hudson fled the Heart Lake School for Girls in the Adirondacks after a terrible tragedy. The week before graduation, three lives were taken, all victims of suicide. Only Jane was left to carry the burden of a mystery that has stayed hidden for more than two decades. Now, Jane has returned as a Latin teacher, recently separated and hoping to make a fresh start with her young daughter. But ominous messages from the past dredge up forgotten memories. Once again, young, troubled girls are beginning to die.

Days after Alex Cooper told her parents she was gay, they drove Alex from their home in Southern California to Utah, where they signed over guardianship to fellow Mormons who promised to save Alex from her homosexuality. For eight harrowing months, Alex was held captive in an unlicensed "residential treatment program" modeled on the many "therapeutic" boot camps scattered across Utah.

In a Stockholm city park, police discover the hideously abused body of a young boy. Detective Superintendent Jeanette Kihlberg heads the investigation, battling an apathetic prosecutor and a bureaucratic police force unwilling to devote resources to solving the murder of a nameless immigrant child. But with the discovery of two more mutilated children's corpses, it becomes clear that a serial killer is at large.

Sonny Lofthus is a strangely charismatic and complacent young man. Sonny’s been in prison for a dozen years, nearly half his life. The inmates who seek out his uncanny abilities to soothe leave his cell feeling absolved. They don’t know or care that Sonny has a serious heroin habit - or where or how he gets his uninterrupted supply of the drug. Or that he’s serving time for other peoples’ crimes. Sonny took the first steps toward addiction when his father took his own life rather than face exposure as a corrupt cop. Now Sonny is the seemingly malleable center of a whole infrastructure of corruption....

This is a fact: Ryan Summers walked into Three Rivers College and killed 13 women, then himself. But no one can say why. The question is one that cries out to be answered - by Ryan's mother, Moira; by Ishbel, the mother of Abigail, the first victim; and by DI Helen Birch, put in charge of the case on her first day at her new job. But as the tabloids and the media swarm, as the families' secrets come out, as the world searches for someone to blame...the truth seems to vanish.

On the eve of their thirtieth birthday, twins Jasmine and Nicolas Moretti celebrate late into the night. But when Nicolas wakes several hazy hours later, Jasmine is dead—and he is covered in her blood. Panicking, he takes the murder weapon and runs into the cold Stockholm night. For the police, it’s an open-and-shut case. Nicolas is guilty. And given that he remembers so little of what happened that night, even he isn’t convinced of his innocence.

Six days ago, Joe Lynch was a happily married man, a devoted father, and a respected teacher living in a well-to-do London suburb. But that was before he spotted his wife’s car entering a hotel parking garage. Before he saw her in a heated argument with her best friend’s husband. Before Joe confronted the other man in an altercation where he left him for dead, bleeding and unconscious.