Well, there is a big mistake in the movie, which made me feel very bad about the movie.
Initially, they have found the 2 dead bodies at the temple who were killed my the tv5 CEO. But later when the protagonist changes the past, 2 dead bodies are now found at the park who are turned out to be his parents. So, basically the present has got changed and tv5 CEO should have no idea about the hero investigating about the murders (at the temple) which he is responsible for. But in the climax, tv5 CEO kills the hero since he tried to do investigation. Actually, the tv5 CEO Should have no memory of this investigation, as only hero and his friend were only the ones who dig the bodies at the temple.
Huge blunder by the director.