A chilling note predicting the deaths of six people is found in a school's time capsule, 10 years after it was buried. But surely, if a 13-year-old wrote it, it can't be a real threat. Detective Huldar suspects he's been given the investigation simply to keep him away from real police work. He turns to psychologist Freyja to help understand the child who hid the message. Soon, however, they find themselves at the heart of another shocking case.