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t's a beautiful morning in July and Nora Linde and her two children go to the beach. During the day's first swim, Nora discovers a body in the water and the Stockholm police is notified. At first it seems to be a drowning accident but Thomas Andreasson, the crime inspector who is investigating the case, soon suspects that it is a murder case. The body is found entangled in a fishing net, Nora manages to figure out whose net it is and contacts Thomas. Nora wants to help the police but knows that her husband Henrik won't approve of it. She finds the support and drive in her good friend and neighbor Signe.

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