Four years ago, when a plague ravaged North City, Su Yue contracted the disease and was on the brink of death. Song Lingfeng brought her home and cared for her devotedly. As they spent every day together, they fell in love and pledged to spend their lives together. Bai Ling'er, a shamaness from the Southern Frontier who was in love with Song Lingfeng, devised a vicious scheme that forced Su Yue to kill all thirteen members of the Song family, turning Su Yue and Song Lingfeng into sworn enemies. She then fed Su Yue a Speechless Gu, preventing her from revealing the truth behind the massacre of the Song family. Determined to uncover the truth, Song Lingfeng cruelly subjected Su Yue to three Heart-Questioning Gu and a public trial of her memories. In the end, the conspiracy of the Nine-Thousand-Year-Old Grand Eunuch to betray the country and the truth behind the extermination of the Song family were finally exposed.