"Downstream" is set in Sweden and revolves around the lives of its characters as they navigate personal and social challenges. The novel's title reflects a sense of movement and change, as the characters' lives and fortunes shift over time.The story typically focuses on the psychological and emotional journeys of its characters, exploring their relationships, ambitions, and inner conflicts. Siwertz's writing delves into the complexities of human nature and the impact of social and personal forces on individuals' lives.