Xia Yunhai and Lin Mochou investigated the missing father case, unfortunately being framed by the mysterious person Alpha, who seized the opportunity to escape. Along the way of the investigation, the two happened to meet Xia Yunhai's ex-girlfriend Liu Shanshan, and the three decided to join forces to fully capture the mastermind Alpha. Layer after layer of clues kept emerging, and danger followed like a shadow. When Alpha was finally captured and the disguise mask on his face was personally removed, Xia Yunhai froze all over. The person in front of him turned out to be the long-missing father! A heaven-shaking twist, all conspiracies are completely revealed.