Prince Murong Jinghe of Dayan led the Weibei Army to recapture the lost territory of Qingzhou. After entering the city with a victory, a fire broke out in Qingzhou. Rumor has it that Murong Jinghe, the Weibei General, hated the people of Qingzhou for betraying Dayan, so he ordered to set fire to the city after entering the city. As a result, he changed from the Weibei General of the Army of Justice to the Killer General who was wanted by everyone. Meilin, a girl from Qingzhou who lost her loved ones in the fire, vowed to kill the culprit of the massacre. Meilin entered the secret organization Dark Factory, took the Momai Poison and became a death soldier. After eight years of brutal training, she ushered in her first assassination mission, and this mission was to assassinate her biggest enemy, Prince Murong Jinghe of Dayan, who she wanted to kill day and night. So, under the arrangement of the Dark Factory, Mei Lin became one of the hundred beauties from Western Yan who were sent to marry into Yan State, waiting for an opportunity to assassinate Murong Jinghe. However, what Mei Lin didn't know was that the owner of the Dark Factory who planned and arranged the assassination behind the scenes was Murong Jinghe herself.