The Prince of War's Mansion has produced two little rascals: the six-year-old third young master Qi Ke and Princess Mingyue Qi Yan'er. While other princes and princesses study and learn the rules in the palace, these two are completely different—every day they sneak out of the mansion to patrol the streets. The older brother puts on a tough, mature act, waving a folding fan to act like a big shot; the younger sister is milk-fierce yet a foodie, holding candied haws while upholding justice. From outsmarting wicked young masters to exposing street tricksters, the two little kids use their milk-fierce way to manage all the idle business in the capital, stirring up a basketful of jokes while also warming an entire city.