In the delivery room of the hospital twenty years ago, a cry led to the wrong thread of fate. Wan'er's daughter, who had gone through all kinds of hardships to raise, was found to be illegitimate in an unexpected blood type test. And her biological daughter Chenghong, whom she has never met, is appearing in her life as the "girl next door". Two mothers and two daughters repeatedly pass each other on the verge of knowing the truth. The misplaced family affection is undercurrent in the clues of daily life. A tug-of-war about blood relationship and upbringing is quietly beginning.
