A girl is found dead in the park. laid out. Almost loving. The victim had with him a summons to witness proceedings by her adoptive parents against the youth welfare office in Wiesbaden. The director is said to have concealed the birth mother's alcoholism during the adoption. Did he murder the girl to protect his lies? But when Reuther discovers a barren dungeon in the adoptive parents' basement, the case takes a sharp turn. The teacher couple Marta and Jens Heswald find themselves at a loss for explanations. The dead girl suffered from FASD syndrome, had uncontrollable outbursts of anger and a difficult personality. Then the investigators open up Agnes' biological mother. The drinker is suspected of having killed her daughter in a fit of anger. Shortly before her death, however, Lucy cheated on her boyfriend Timmy Offner. Did he kill her out of jealousy?