Su Nian'an is in the Su family where everyone is the boss, but he is the only one who is lying flat and is recognized by the whole family as a little loser. One day, Du Ruoqing, who claimed to be a real daughter, came to the door and claimed that she was given the wrong baby in the delivery room and forced her to give up her seat. The parents of the Su family are calm and the brother is indifferent. After a farce, the paternity test and family farce take turns to take place. Du Ruoqing competes for favor, stirs up troubles, and wants to be the heir, but she often falls over and is kidnapped by Wang Ma and involved in the mystery of her life experience. In the end, the truth came out, and Su Nian'an was indeed the biological child of the Su family. Du Ruoqing was sent to Argentina, and all the members of the Su family began to learn to accompany this unique little loser daughter, which was heartwarming and funny.
