Facing a confrontation with her own past at home, French policewoman Kahina Zadi takes on a special investigation while on vacation. She travels to Kiruna in Sweden’s remote far north to look into the brutal murder of a French citizen. Working with Swedish prosecutor Anders Harnesk, she embarks on a race to catch up in the northern night that is as bright as day, amid the breathtaking backdrop of Lapland. Harnesk, a single father and Sami, is a reluctant detective who would rather hide in fear behind his new colleague. Zadi is confronted with a brutal and reckless serial killer who is always one step ahead of her and seems to be following a macabre plan, while her own painful past relentlessly closes in on her. Over eight episodes, the pair of mismatched detectives Zadi & Harnesk try to get to the bottom of the mysterious murders.