In the dead of night, a mysterious murder shocks a coastal town as the respected elder Guan Jingtang is brutally killed in his villa. Detective Captain An Ping and rookie investigator Shang Jie join forces to unravel the case, but their investigation soon reveals a web of contradictions, missing cash, a mysterious woman in red, and a bloody flower pattern. As more murders connected to Guan unfold, the case becomes increasingly complex. Under immense pressure, An Ping and Shang Jie dig deep, uncovering a long-buried case that ties directly to their own pasts. With their personal histories intertwined with the case, they must unravel a web of secrets to bring the culprit to justice.