In 1995, on the small, idyllic island of Karmøy, in Western Norway, 17 year old 

Birgitte Tengs is brutally molested and murdered, a short distance from her home. After a two-year investigation, the police ignore the forensic evidence and interrogate her  19-year-old cousin for 3 weeks. He finally confesses to a murder he can't recall. Later, he withdraws his confession, but it is still considered in court and is his downfall, as he is found guilty of rape and murder, and sentenced to 14 years in  prison. In the appeal, his confession is  dismissed, and he is exonerated by the jury, but the judge still sentences him to pay damages.  

The True Crime Series’ Investigation reveals the desperation of the police to find a murderer while ignoring several other actual suspects. As the stigmatized cousin flees the country, we track down the other suspects that were never properly investigated. 26 years later in 2021, the police get a DNA match to our prime suspect. He is jailed and the question Who Killed Birgitte? will most likely be answered.