Anno 1790: Season 1

Barber-surgeon Johan Gustav Daadh returns to Stockholm from the war in Finland. He's taking a patient, Simon Freund, to chief constable Wahlstedt's home, where Freund has been working as a tutor. But there Daadh's life takes an unexpected turn. For one thing, he falls head over heels in love... with the chief constable's wife Magdalena. And he also becomes involved in solving a murder case, which he does so successfully that, to his surprise, he is offered the position of district commissioner, i.e. police inspector. Daadh's first reaction is to turn it down, since he's a political radical and objects to the injustices in society. But when he realises that Magdalena believes in him, he decides to accept the job, with Simon Freund as his assistant. Johan Gustav Daadh's intention is to use his new position of power to try and make a difference... in the name of justice.

A shop owner is found dead with a knife in his chest. A man has been caught seemingly red handed, but Daadh is not satisfied with what seems to be the obvious solution, and instead tackles the problem from a completely different angle and reaches a surprising conclusion. One of Daadh's radical friends from the old days needs his protection, but their meeting ends in tragedy that suddenly makes Daadh the focus of a vengeful woman's rage.

Libellous pamphlets against the king are being distributed around town. When Daadh is going to interrogate the person who printed them, the man is found murdered, his skull crushed in his own printing press. Daadh's investigation brings him in contact with a beautiful and radical young French woman, and, after a few more gruesome murders are committed, Daadh realises that the old adage holds true hell hath no greater fury than a woman scorned. This is just as true of Marta Raxelius, who is convinced that Daadh killed her brother and will stop at nothing to get her revenge.

A cunning burglar is wreaking havoc in Stockholm. As the panic spreads, Daadh is under great pressure to apprehend this masked thief, who is known to be both dangerous and violent. He is close to getting caught, but escapes, whereupon Daadh is offered help from the renowned hypnotist Cagliostori, who happens to be performing in the city. Daadh allows himself to be hypnotised, falls asleep and wakes up in a most unpleasant situation where his very life is in danger.

A very strict priest is lending money on the side.

After a political execution the dead body disappears and Dååd must find the body since it may contain evidence of his radical leanings.

Dååd investigate a string of children who have disappeared from an orphanage.

A landowner is found dead in the stables of his estate, kicked to death by his horse. Daadh soon determines that the tragic accident was actually a murder. He has no difficulty finding people who bore grudges against the victim, but is unable to tie any of them to the crime. Any member of the victim's family could have done it, but the evidence is very scanty. Then the chief constable intervenes and decides that the law must run its full course someone has to be found guilty!

Dåådh visit his old professor in Uppsala when one of the students is murdered.

Daadh's world has been shaken to its foundations. His friend Freund has disappeared and Daadh's worst enemy has taken the deathly ill chief constable's place. Through his knowledge of medicine, his courage and his ability to see patterns in seemingly unrelated events, Daadh succeeds in turning the situation around, and even uncovers a crime ring with connections to the highest levels of society. But suddenly he is harshly confronted by his own past and is forced to bargain with those in power in order to save his life. This experience causes him, for the first time, to seriously question his future as an officer of the law.