Lin Wanqing stops Huo Sihan's car on the Jiuqu Ridge highway, saving him from plummeting into a collapsed deep valley. To repay her, Huo Sihan covers all surgical expenses for Lin's mother and invites Lin Wanqing to join the Huo family's finance department to investigate the dark secrets behind the collapse of the Longmen Gorge Dam. The two join forces to fight against Huo Kun and his daughter, decipher offshore black accounts, resolve the dam crisis, and finally hold a wedding by the Jiuqu Ridge highway, going from a life-saving grace to sharing life and death together.