Keno Breck is a police officer selected to go undercover and infiltrate the Costa family. During the mission, he falls in love with and marries the family's daughter, Rae Costa. But for the sake of the operation, he still sends Rae's father, Matteo Costa, to prison. In the end, Matteo is shot and killed while resisting arrest. Grief-stricken, Rae leaps to her death, and Keno chooses to follow her. He is reborn eight years earlier, back to the very first time he met Rae. This time, he still chooses to carry out the undercover mission and infiltrate the Costa family—but now he is determined to protect Rae and steer the family onto the right path.