In an upscale neighbourhood, a woman is found drowned in a pool. Suspicion falls on her boyfriend, Tom, a notorious con artist and Tinder-swindler. When he unexpectedly turns himself in, he admits to fraud, but insists her death was an accident. The experienced investigator Morten Stark is convinced he's lying – and, lacking hard evidence, plays a risky game to expose him. Meanwhile, journalist Nora Sand digs through a former colleague's research and uncovers multiple past fraud cases against Tom. As she and her team trace his past, they reveal a chilling secret and uncover a tangled web of deceit, exploitation and murder.

Journalist Nora Sand works as a foreign correspondent for a Danish newspaper, spending most of her time in London. She's at the peak of her career when she's accused of having had an affair with one of her sources in a big case. Nora gets suspended, travels home to Denmark in order to lie low until the scandal has cooled off. But when she's given an anonymous tip about an old missing people case, she can't resist. In the 80s, two young girls disappeared from the ferry travelling from Denmark to England and have not been seen since. Nora investigates the case, which turns out to have an unexpected connection to serial killer William Hix, who is serving a life sentence in England. As the case unravels, Nora begins to fear for her own life, as she suspects another killer is following her every move…