Behind the hustle and bustle of the bustling city, there is a little-known story about the life of a substitute. Lin Yu's life path was intertwined with that of an ordinary family due to an accident. As the gears of fate turned, Lin Yu became an unknown substitute and entered a world she had never imagined. In this circle full of money and power, between lies and truth, in the struggle between love and friendship, Lin Yu gradually lost and struggled to find herself. Where will her substitute life go, whether she will return to ordinary life or rewrite her destiny. Everything is full of unknowns and suspense.
