By the end, Vikram realizes that the line between a hero and a villain is often just a matter of perspective. Why It’s Considered "Deep"

If you are looking for a deep dive into the characters' motivations or the specific folklore influences,

However, the "deep" part of the story begins when Vedha voluntarily surrenders to the police. Instead of confessing, he insists on telling Vikram three stories from his life. The Three Riddles