Fátima and Laurinda are mother and daughter and the only thing they have in common is their blood ties. While Fátima suffers a series of misfortunes because of her daughter, Laurinda seeks to ascend socially at any cost through a millionaire marriage with the Martins de Mello heir. Meanwhile, Raquel, the widow of Fatima's brother, returns to Portugal to confront the Martins de Mello family, whom she judges guilty of her husband's death in the 9/11. Parallel to intrigues, rivalries, secrets, blackmail and betrayals, the arrival of a great mystery haunts everyone's lives forever: The enigmatic Tubarão.