Efterforskningen - Season 1

When Head of Homicide for Copenhagen Police Jens Møller comes in for the morning briefing, an investigator reports on a strange case. A homemade submarine carrying a female Swedish journalist and the submarine's inventor has gone missing. When the submarine is located later in the day, only the submarine's inventor is rescued before the submarine suddenly sinks. Now Jens Møller and his team of investigators must quickly decide how to approach the case, as the journalist is still missing and the submarine is at the bottom of the sea.

Jens Møller is under constant pressure from reporters who are chasing news of the case. Meanwhile, rumors and theories abound. Were the Swedish journalist and the accused previously acquainted? Did they stage it all as part of 'a happening'? The journalist's parents are assisting the police in their work to find out what happened to their daughter, and forensics are working hard to find important clues in the capsized submarine - without any luck. Then the case suddenly takes a dramatic turn.

While the forensic team works, Jens Møller and his team of investigators are waiting for answers. Have they found conclusive evidence that the Swedish journalist is dead, and if so, has a crime been committed? Jens Møller goes to Sweden to confirm the journalist's death to the grieving parents while Navy divers search the seabed in the Sound for more clues. Jens Møller then has a radical idea that might help the investigation.

Jens Møller gets assistance with the search. Swedish cadaver dogs that can locate bodies more than 20 metres below sea level are brought in. Although the dogs mark the areas quite accurately, the divers don't find anything. There is a question over whether the dogs can be used at all. Then Jens Møller hears from an oceanographer who offers new insight.

The case is slowly coming together, but Jens Møller and his team still have no conclusive evidence. Chief Prosecutor Jakob Buch-Jepsen emphasizes that they must determine the motive and cause of death in order to bring charges against the accused. They must be able to dispel any reasonable doubt. Otherwise, there's no case. Jens Møller calls a surprise press conference with the hope of encouraging the accused or his acquaintances to talk, while a more thorough search of the suspect's computer reveals some gruesome secrets.

Chief Prosecutor Jakob-Buch Jepsen makes it clear to Jens Møller that they need more firm evidence to bring charges in the case. Otherwise, they risk the accused walking free. Investigator Maibritt Porse refuses to drop the case, and after nearly 6 months of hard work she finds the key that might dispel any reasonable doubt. Jens Møller appears to have solved an impossible case, but at the same time, he realizes that his time as Head of Homicide is coming to an end.