Oskari Autio's past comes back to haunt him when the mother of his child and former drug addict, Krista, shows up at his home looking for a fresh start.
Oskari reminisces on his past with Krista. One of Niko's friends invites him to a party, Oskari worries Niko might end up in trouble.
Krista visits Jonttu's apartment only to be met by Kode in a violent confrontation that leaves her fearing for Jonttu's life. Niko begins asking questions about his birth mother.
After his colleagues receive an image that shows Krista spending with Kode, Oskari confronts her to see if she's joined their drug dealing ring.
Juulia moves in with Oskari and Niko, and Krista tries to fend off Niko's attempts to spend time with her. As the narcotics team moves in on the drug dealers, Oskari pushes Krista to provide more information.
Krista joins Oskari, Juulia, and Niko at their home for dinner in an awkward attempt to relieve some of the tension of the situation. Niko and Krista bond, but Juulia is left feeling on edge.
Julius plans a huge cocaine shipment; the NBI plans a raid. Oskari advises Krista to avoid the gang so she does not get caught up when the police get involved.
After Kode is murdered, Oskari tries to convince his colleagues that Kode was his informant in an effort to keep their attention off of Krista.
The NBI moves in on Julius, and some of the gang members pick up Krista and Niko. Juulia confronts Krista about her negative influence on Niko.