Watch FMovies. A father has been keeping his martial arts knowledge that he had learnt a long time ago from his son a secret because of the black history that he went through. His son is a Muay Thai boxer and upon much insistence, the father finally passes on the knowledge known as the `Jirus Siku 12 Langkah Derhaka` to his son who will be competing in the 2021 Pendang Muay Thai open competition.