When Sophie Brinkmann meets Hector Guzman, her life is perfectly uneventful. She's a nurse and a single mother, living with her son in a sleepy Stockholm suburb. She likes Guzman's quiet charm and easy smile; she likes the way he welcomes her into his family. She quickly learns, though, that his smooth façade masks something much more sinister, he's the head of an international crime ring that is at war with a rival organization. Before she can fully grasp the extent of his dangerous world, her life starts to come undone, her family is at risk, a long-lost friend mysteriously resurfaces, and she realizes that she can trust no one.