When one of her students is suspected of theft, teacher Carla Nowak decides to get to the bottom of the matter. Caught between her ideals and the school system, the consequences of her actions threaten to break her.
In a hospital in Hamburg, an unidentified woman is disconnected from the life-support system. While the investigators search for the mysterious perpetrator, two more men are murdered.
A year after her best friend's suicide, 19-year-old Nele has retreated and is working with aquarium fish. When new colleague Ella tries to reach out to her and they rescue a rare seahorse from a shady seller, Nele is forced to confront her feelings.
