At Gu Chi's mother's funeral, Jiang Lan adopted Gu Chi who was willing to take care of in the name of "sister" and became a beam of light in Gu Chi's dark life.Gu Chi also gradually fell in love with this beautiful "sister".Will the age barrier hinder the development of the relationship between the two, and in the face of the confession of the "brother", how will the domineering "sister" deal with?