Three years ago, Lu Shiyao fell to death, and the evidence pointed to Su Wan. Lu Shiyan imprisoned and tortured her, forcing her to be his sister's substitute. Su Wan endured the humiliation and endured the heavy burden to save her younger brother who was in the advanced stage of leukemia, but was treated coldly and harshly by Lu Shiyan and framed by Lin Weiwei. Her congenital heart disease was also ignored. It wasn't until Su Wan was critically ill that Lu Shiyan learned the truth. He was filled with guilt and frantically made amends, only to find that his sincerity had long been broken. The truth is revealed, he hated the wrong person, and his belated tenderness eventually became an irreparable regret.