Hassel (season 1)

The life of the Stockholm police detective Roland Hassel turns upside down after his boss and mentor Yngve Ruda was severely beaten and killed in the street. Along with his team, Roland is going to find the criminals and to get revenge for the death of the closest person. But the more his investigation reaches the more unsightly secrets he finds. The person who, as he thought, he knew well, is engages in corruption. From now Roland cannot trust anybody.