Little milk bun Shen Yueya of Cangqi Mountain is ordered by her master to go down the mountain and search for five missing "toys." Who would have known that two years in the mountain would mean three hundred years had passed in the outside world? The small sword has become a sect-guarding divine weapon, the small drum has become a state-protecting sacred vessel, and the remaining toys have also shaken the world in their own right. Along the way of reunions, she gradually discovers that behind the disappearance of the divine weapons lies the conspiracy of the Casting God Palace. But in Yueya's eyes, they were never weapons driven at will, but family who can feel pain, can choose, and can also go home.