The investigator Arthur gets one step closer to uncovering the secret behind the mysterious substances found in the baby carriage. Train driver Edith and Kurt, the cameraman, are also getting to know each other better.

Elling arrives at the crime scene. The criminal police investigators exchange initial observations, clues, and theories about how the crime unfolded.

At the gruesome crime scene, the investigators find clues regarding the murder's motive, including something very disturbing about the victim.

Arthur now questions Christa Hartmann more thoroughly. Marlis and Gerd find themselves in a severe conflict. Their different views on future and responsibility put their relationship to the test.

Lona tries to learn more about the victim and how the body was discovered, and Elling learns that his wife couldn't have met with her intern that day, as according to a colleague, he was sick.