An upper middle-class woman is found dead in the park near her home.

A second murder and secret emails lead the Special Division to the culprit.

A dazed child covered in blood leads to a gruesome discovery.

Arno uncovers a love triangle.

The Colonel stops an armored truck robbery, only to discover the money is fake.

The counterfeit money leads to a printing press and a kidnapping.

A man put in jail by the Colonel requests help in finding his missing son.

A post office robbery plot leads to a break in the case.

Cultic symbols are drawn on a history scholar lying dead in his kitchen.

The team discovers some of the scholar's many enemies.

Desperate parents ask for help in finding their missing son.

The kidnapping ransom goes mysteriously unclaimed.

A serial killer uses social media to target young women.

In the middle of the investigation, Alla faces a disaster of her own.

A district prosecutor is assassinated outside of his home.

The investigation uncovers a revenge plot gone awry.