Motherless: Maria returns to work as head of the murder squad after short maternity leave. She wants to be a loving mother and a good police officer but can't be in two places at the same time.
Maria investigates the murder of a figure skating coach and learns about the strict life the figure skaters lead. Maria wonders what kind of world will her daughter grow in. Taskinen has come up with ideas for modernizing their unit.
Maria gets a new detective, Anu Wallin, on her team. Maria is jealous of Koivu. Stay-at-home dad Antti is satisfied with his life and Maria feels like an outsider everywhere.
The murder of a local politician takes Maria into triangle drama. Maria thinks about her own traditional family choices. Maria is afraid of losing Koivu and is not ready for it.
Maria investigates the death of a writer who lived a double life and rethinks her relationship with Koivu. Antti proposes to Maria. Susanna thinks she's being followed.
To Maria's surprise, Koivu applies for a transfer. Susanna has been kidnapped. Maria suspects revenge. Ström wants to handle the negotiations with the kidnapper.
Ström's death and yoga teacher's murder are too much for Maria. She can't take the constant brutality and presence of death. She goes to her cabin to regroup to be able to be a mother.
Maria's friend Johnny asks for Maria's help with his great-aunt's death. While investigating the care home's questionable methods, Maria is drawn to Johnny.
Maria investigates the murder of a young man at a party. Anu and Koivu's relationship stings Maria, but she has to try to save what can be saved in her own life.
Maria investigates an execution and has to step into an undercover role and to weigh her loyalty. She says yes to Antti's proposal. But is it already too late?
