Three years ago, Detective Saga Bauer received an ominous postcard describing a gun and nine white bullets --- one of which was intended for her partner, Detective Joona Linna. The sender alleged that Saga was the only person who could save him. But as time passed, the threat faded. Until now. A sack with a decomposing body has been found hanging from a tree in the forest. A milky white bullet casing turns up at the scene. When the body count begins to rise, the police realize that the killer is sending riddles, offering them the chance to stop the murders before they happen. But the police always seem to arrive a moment too late. As they begin to close in, the case becomes more and more tangled: someone is spinning a fiendishly intricate web, pulling Joona ever closer to a trap he may not be able to escape.

Sixteen-year-old Jenny Lind is kidnapped in broad daylight on her way home from school and thrown into the back of a truck. She’s taken to a dilapidated house, where she and other girls face horrors far beyond their worst nightmares. Though they’re desperate to escape, their captor foils every one of their attempts. Five years later, Jenny’s body is found hanging in a playground. As the police are scrambling to find a lead in the scant evidence, Detective Joona Linna recognizes an eerie connection between Jenny’s murder and a death declared a suicide years before. And when another teenage girl goes missing, it becomes clear to Joona that they’re dealing with a serial killer --- and his murderous rampage may have just begun.

After years of petty crime, Sami is training to be a chef. But when a business deal suddenly goes sideways, he is left wondering how he'll ever provide for his newborn daughter. Michel and his family fled a bloody civil war in Lebanon. He's trying to turn over a new leaf, but the past just won't let him go. Niklas has traveled the world and made an effort to become the sort of person people talked about, but no good has come of it. Zoran is a businessman who knows everyone and seals a deal with a handshake. And Alexandra? She's the reason that the four men found themselves plotting to rob a Stockholm cash depot in September 2009. At first, the plan seems foolproof. But not everyone is who they seem. What secrets does each man hold?