Eighteen years ago, due to a malicious swap, the true Su family daughter, Cheng Pandi, grew up suffering abuse in a poor and violent foster family. Meanwhile, Su An'an, who should have been living through hardship, enjoyed eighteen years of pampered luxury in the Su family. When the truth is uncovered, Cheng Pandi returns to her biological Su family, but her family's hearts have long since been filled by the foster daughter, Su An'an. Her older brother, Su Zhe, had known the truth about the baby switch early on yet deliberately concealed it, and even secretly tampered with Cheng Pandi's college entrance examination application. Her parents, feeling heartache for Su An'an who bears old scars, time and again ignore their biological daughter's grievances, willfully trampling upon her pleas and dignity.