Episode 4: Bäckström has a theory about what might have happened to Jaidee, but the team is sceptical and he can't prove anything yet. Meanwhile there is suspicion that someone on the force is giving information to a criminal gang. Fingers begin to point at Bäckström, and Hwass receives support in her quest to get him fired. New details emerge about the case, and young neighbour Edvin finds a suspect.