Si Yao, the legitimate daughter of the Marquis of Zhen Guo, and Murong Heng, the young general of the Murong family, have been childhood sweethearts playing under the locust tree since they were young. The marriage between the two families is a rule passed down from ancestors, and it is a marriage contract personally given by the late emperor, in order for the civil and military forces to work together to stabilize the shaky political situation. Everyone in the capital knows that the friendship between this young couple has lasted for several years accompanied by the fragrance of the old locust tree. But just as the wedding was approaching, the distant cousin of the maternal grandfather's family was suddenly coerced and placed a dead pigeon with a threatening note in front of the Marquis's house, targeting the marriage. Can their marriage survive?
