Oldboy and No Mercy has many similarities. To list a few major ones are Story is similar, Revenge is also similar. And finally at the climax a huge twist appears which makes the movie to the top level.
Both movies revolve around fathers that are willing to do anything to fight for/avenge their daughter. While in "My Little Baby, Jaya" the daughter has been murdered and her father is now out for revenge, "No Mercy" focuses on a father trying to find his daughter who has been kidnapped by a murderer. Both dramas are extremely tragic and intense to watch.
Both dramas revolve around fathers that work as in the criminal forensic field. Both work cases where they find out that they are linked to their missing daughters. Both fathers are now out to find their daughter and are willing to commit crimes themselves in order to find them. Both are very intense and brutal dramas.
