Former criminal Rickard has vanished. Fleeing Sweden and the old friends he has testified against, he abandons his name, his life, and his family to start over in Thailand. Ten years later and still with a price on his head, Rickard knows that a return home would be a death sentence. And so he ekes out his existence as a small-time crook in the back alleys of Phuket. Life’s tough and dirty, but at least it won’t kill him.

Detective Roland Hassel's father figure and mentor, Yngve Ruda, is brutally murdered in the middle of the street. Devastated, Hassel decides to undertake his own covert investigation to find Ruda's killer and avenge him with the support of 'Triton', a special task force consisting of Hassel's most devoted co-workers. But Hassel's obsession with the case affects his family as well. As Hassel, his girlfriend Daniela and his 14-year-old stepdaughter Vida struggle to stay together as a real family they find themselves in a downward spiral taking them further and further into an abyss. Meanwhile, the evidence on Ruda's killer leads away from the street and up the corridors of power in Stockholm and Brussels. But Hassel's battle against crime and corruption knows no boundaries and he will stop at nothing.