The killer Yueyao went down the mountain after completing her studies and went to carry out the first killing mission given to her by her master: He Yunxing.On He Yunxing's wedding night, Yueyao replaced the bride's identity and waited for an opportunity to kill He Yunxing. However, He Yunxing, who was alerted, repeatedly escaped and was involved in the battle between He Yunxing and the enemy.
Under the crisis, Yueyao encountered many crises, but was rescued by He Yunxing. This scene evoked a fragment of memory that Yueyao had lost: the tragic death of her mother at the hands of others.In order to find the real murderer of her mother, Yueyao decided to temporarily live with He Yunxing as a bride, but she was involved in a bizarre murder case, and Yueyao was identified as the murderer.