Is it worse to deceive to your husband or the police?
Rikke is lying to them both.
But how many lies can she get away with?
When her upstairs neighbour Jørgen is found murdered, she's questioned alongside her husband. How can she admit that she and Jørgen were having an affair? Or explain to the police the complexity of her feelings? The hint of relief that he's dead. And what would they say if they knew she used a spare key to enter his apartment the morning after he was killed?
Rikke knows she can't hide the evidence of the affair from the police. And if she's caught in her lie, suspicion will turn to her.
With her perfect family life threatening to unravel, Rikke realises that finding the killer is the only way to put herself in the clear. So long as the killer doesn't get to her first.