The Investigation

While Jens Moller enters the morning briefing, an investigator reports a homemade submarine carrying a female Swedish journalist and the submarine's inventor have gone missing.

The journalist's parents are assisting the police, and forensics are working hard to find important clues in the capsized submarine but no luck. The case suddenly takes a dramatic turn.

While the forensic team works, Jens Moller and his team of investigators are waiting for answers. Have they found any conclusive evidence that the Swedish journalist is dead?

Swedish cadaver dogs that can locate bodies below sea level are brought in but the divers don't find anything. Jens hears from an oceanographer who offers previously unknown information.

The case is coming together, but Jens Moller and his team still have no conclusive evidence; prosecutor Jakob Buch-Jepsen emphasizes that they must have the motive and cause of death.

Jepsen makes it clear to Jens that they need more firm evidence. Maibritt refuses to drop the case, and after nearly six months she finds the key evidence that will reveal the killer.