According to Frost Error

The geese in the north return to the pass, and the snow wolves howl at night. Twelve-year-old Li Guiwan used half a jade pendant and a broken sword to carry eight-year-old Shen Yao back to the world from the mountain of corpses and sea of ​​blood, promising him "I will hold up first when the sky falls." For the next seven years, they depended on each other in Cixin Valley. She was a gentle and strong senior sister, and he was a paranoid and yandere junior brother. The two thought they would protect each other for the rest of their lives. Until the master gave a secret order: Go down the mountain and kill General Li - Li Guiwan's biological father. The truth is suddenly revealed: •Shen Yao is the orphan of the former prince, and the enemy who massacred the city is General Li; •My fathers once used "Zhaoshuang" as a betrothal and married on the fingertips, but they were crushed into a sea of blood by a misinformed military order; •The master laid out a ten-year deadlock just to allow the two children to complete the final revenge sacrifice with their own hands. In the iron prison of the execution ground, Shen Yao tied his wrist with a chain and asked with red eyes: "Sister, I have always regarded you as a relative, why did you even lie to me?" Li Guiwan burst into tears with laughter: "If I die, I can bring you back from hell. Is that enough?" ——She gave him pregnancy in exchange for the antidote, and he broke into the palace alone to kill the king; ——She led the cavalry from the north to the south, and he came out of the fire with the baby in his arms. When the father's debt was paid off and the poison was cured, a "Zhaoshuang Tavern" appeared on the snowy plain. The one-armed shopkeeper tells stories, the veiled accountant adjusts the abacus, and the three-year-old baby calls daddy. Wild flowers sprouted from the cracks of the broken sword. They once mistook the whole world, but now they will only miss you for the rest of their lives.