Original: 长乐曲
It tells the story of a pair of mortal enemies who accidentally became a couple but fell in love with each other in a series of bizarre cases and finally chose to fight side by side.
Yan Xing investigates a suspicious death and crosses paths with the formidable Shen Du. Before she can focus on her upcoming examination, an unexpected marriage decree changes her plans.
When her sister disappears before her arranged marriage, Yan Xing steps forward to protect her family. She becomes Shen Du's bride and enters a marriage neither of them expected.
Yan Xing begins investigating a mysterious double murder despite Shen Du's attempts to keep her away from the case. As they are forced to spend more time together, the two begin to learn more about each other.
A series of disturbing deaths draws Yan Xing deeper into a complicated investigation. At the same time, Shen Du finds himself facing political pressure from Lai Luozhi.
Yan Xing notices similarities between several seemingly unrelated deaths and refuses to give up on the investigation. Shen Du begins to recognize that her instincts may be more useful than he expected.
New evidence gives Yan Xing and Shen Du only a short time to stop another murder. Yan Xing proposes a risky plan that requires her to place herself directly in the killer's path.
Yan Xing continues pursuing the killer despite the danger. As the investigation reaches a critical point, she and Shen Du must work together to uncover the truth behind the strange murders.
Yan Xing's abilities finally earn official recognition, giving her the opportunity to investigate cases more freely. Her new role also brings her closer to Shen Du and the mysteries surrounding his household.
Yan Xing investigates the disappearance of a scholar while Shen Du continues searching for answers about his own family's past. Their separate investigations begin to reveal connections neither expected.
A shocking discovery brings an old case back to the surface. Yan Xing and Shen Du race to protect those caught in the middle while trying to understand who is behind the mysterious Fire Moth killings.
The Fire Moth case becomes increasingly complicated as Yan Xing and Shen Du uncover new connections. Meanwhile, tensions between different political factions continue to grow.
A mysterious woman enters Shen Du's household with information that could change his investigation. Yan Xing becomes increasingly suspicious as more secrets surrounding the old cases come to light.
Yan Xing follows another clue connected to the investigation and soon finds herself in danger. Shen Du is forced to confront how much he has begun to worry about his wife.
An unexpected situation leaves Yan Xing and Shen Du with little choice but to remain close to one another. As they lower their guards, Yan Xing learns something about Shen Du that few people know.
A new clue connects the current investigation to an old tragedy involving an embroidery workshop. Yan Xing finds herself caught in a dangerous accusation while Shen Du works to uncover what really happened.
More deaths suggest that the earlier case may not be over. Yan Xing and Shen Du pursue different leads while the mysterious Fire Moth symbol continues to appear.
Yan Xing discovers that someone may have been manipulating the investigation from behind the scenes. Shen Du's own investigation also brings him closer to the truth about his family's troubled past.
The Fire Moth case erupts into another dangerous confrontation. Yan Xing and Shen Du realize that the enemy they are facing may be much closer to the court than they imagined.
As Shen Du recovers from his injuries, memories from his childhood begin to resurface. Yan Xing remains by his side while their relationship takes an unexpected emotional turn.
No overview available for this episode.
