Both movies are all about revenge. There are sister relationship. Also a detective on both movies fell for the female lead. The detective after know the truth become the female lead’s lover

Both movies the main female leads were victims of sexual assault. BothFL plot to revenge. The main male lead were the detective, tiresomely trying to catch the serial killer.

Both female leads are skill fighter. Both movie the couple plot and end together somewhere else remotely. The man suspected the female lead but sympathy and fell for her

Strong woman, skill female fighter, revenge. They were victim before. A man like her, help her, plot twist, slight romance

The main lead served prison time. After they released, they still have to face the villian. They have to finish the business

Both Korean movie and drama the main lead served prison time but they wasn’t the main killer. After released they hunt for the real killer and seek revenge

Both female lead went to jail. After they released, they decided to seek revenge. Punish the real killer.

Ji Sunb in both drama. He went to prison on this one, but in Secret the female lead went to prison. They were both innocent

Both main lead went to jail. They tried to do right but can’t. They have to finish the business. They have to fight for themselves, as the justice system can’t be trusted.

Both female lead are strong minded. Seeking revenge and justice. Not trusting police. Personal revenge.

Both are very strong female leads seeking revenge. They are both skillful fighter. They put themselves in danger situation …

Both are woman seeking revenge. Chinese one in historical era, Korean one in modern. Both are beautiful and skillful. They plan and the execute