人鱼小姐Davi Martins, a commercial director of a financial institution, and Juliana Martins, a personal trainer, are a couple trying to recover from a crisis. At work, Davi ends up getting involved in the investigation of a financial scandal, putting himself in the crosshairs of dangerous people. Little by little, Juliana discovers that her new home may not be a new beginning, but the stage for a real nightmare. Some secrets may end her life