In the 27th year of Longwu, a strange snow suddenly fell from the sky. This snow was not cold but warm, and it did not melt. Later generations called it "Warm Snow." Three months after the "Warm Snow" began to fall, Bi'an, the top assassin of the demon-slaying organization "The Compassionate Mother Sect," was ordered to head to the imperial capital. Along this journey, fragments of history gradually unfold—revealing how this dynasty declined from its peak and how the four great families defied the heavens...