Yong an, the capital city, fell into chaos due to the collapse of the West Canal. Wenqi Shen, the Minister of Works in charge of the construction, was implicated overnight and thrown into prison. "When the nest is overturned, no egg remains intact." Wenqi Shen's two daughters, Ran Shen and Zhen Shen, found themselves trapped in a dilemma one after another. Especially Zhen Shen, the youngest daughter, who had always been sheltered in seclusion and was ignorant of the world, now struggled to fend for herself on the streets. During this time, Shiyan Lu, the imperial prosecutor responsible for investigating the case, was perplexed by recurring dreams of his entanglement with a mysterious woman. After verification, he discovered that the mysterious woman in his dreams was Zhen Shen, the daughter of the guilty official. Shiyan Lu gradually approached her, stepping into an unknown fate. As they delved into the West Canal case, they experienced life and death, entrusted each other with faith, and developed a deep affection. With Zhen Shen's help, Shiyan Lu uncovered the truth behind the case. However, the true mastermind was silently closing in on the two of them.