For a number of years, Michael has swindled and deceived his workplace, his girlfriends and even his own son. But at Christmas time, he makes a drastic decision and brutally kills his own girlfriend, Mette, in order to raise her cash benefit and defraud her relatives. But how can it go so far? How can a simple con artist develop into a cold-blooded killer? Former investigator Sebastian Richelsen is looking for an answer to that.

One November evening in 2018, the 28-year-old family man Rasmus is at a pub in Hadsund, as so often before. That same evening, 40-year-old Petrea went to town to party with her friends. During the night, a chance meeting develops so fatally that it will shake not only the local community, but the whole of Denmark.

The 22-year-old law student Jeppe Møller outwardly looks like any other well-functioning young man, but Jeppe is a man on a dangerous mission. Jeppe wants to be Denmark's first serial killer and in his early 20s he writes his manifesto and formulates a secret list of 17 women.

At only 15 years old, a promising political future looms for the exuberant and self-confident Jan-Evald Pedersen Hardlei - but the political career will be short. 3 years later, he is left as a murderer, and the victim is his former childhood friend.

Kevin Adrian Werner is known as Denmark's biggest serial offender. For years he abused children and young people in the hooligan environment, until he was finally convicted of no less than 1300 assaults. Former investigator Sebastian Richelsen investigates how it could go so wrong. Are there more victims than the public knows about?