A thousand-year-old black fish spirit from West Lake was infatuated with a beautiful man and transformed into Die'er's stepmother. Die'er was severely burned by the cruel stepmother, her face was ruined and she was thrown into the sewer. Ten years later, a masked girl appeared in the city like Batman. She saw injustice and punished evil and promoted good. However, she harbored a deep hatred. She could never avenge her. Her enemy was not a human, but an elf. What should she do?