Su Tangtang, a soft and cute junior sister who has lived in the deep mountains since childhood, takes her master's order to go down the mountain to look for her five senior brothers whom she hasn't seen in years. Her master coaxed her by saying that her senior brothers were living in poverty outside, and asked her to go down the mountain to relieve and take care of everyone. The naive junior sister believed it to be true, carrying ninth-grade pills as candy and a heavy sword into the mortal world. Along the way, she enthusiastically meddled in affairs and frequently caused hilarious troubles. However, she doesn't know that her five senior brothers are already top big shots who shock the three realms. Learning that the junior sister entered the world alone, all the big shots instantly panicked, put down their hegemony in their hands, and rushed down the mountain to protect their sister.