When government hit man Will Robie is given his next target he knows he's about to embark on his toughest mission yet. He is tasked with killing one of their own. Evidence suggests that fellow assassin Jessica Reel has been turned, and she's leaving a trail of death in her wake. The trap is set. Send a killer to catch a killer. But what happens when you can't trust those who have access to the nation's most secret intelligence?
A deafening explosion rips through the air in a Swedish town. Broken glass and tulip petals cover the cobblestones, and two little girls, twin sisters, are killed while their mother is left fighting for her life. At the same time DI Malin Fors mother has just died and is plagued with questions about her past and secrets that her mother never revealed she must bury her own pain if she is to find the sisters killer before he strikes again.