Tangguo is a fool with an IQ of only six years old, and she is abandoned by her original family. At this time, Xiao Hongguo, a little girl from next door, steps forward bravely. Xiao Hongguo takes older sister along to come to the Huo family, and the two sisters' sincerity wins the love of everyone up and down the Huo family. Tangguo and Xiao Hongguo obtain a happy life from then on, and the Huo family's luck also gets better and better.