In a coastal megacity, a “cold-case translator” who can reconstruct crime scenes from fragments of text and data is forced to collaborate with the lead investigator of a serial case that resurfaces every seven years. Their partnership begins as mutual suspicion: she may be connected to the first victim, and he once interrogated her as a person of interest. As bodies reappear in staged “love-letter” rituals, the case turns into a war of psychology, money, and power—leading to a hidden organization that trades identities like currency. The closer they get to the truth, the more their romance becomes the killer’s lever… until they realize the murder pattern is not just a crime, but a message aimed at them.