Thai horror film.

It is the story of two brothers. One is a hired killer, who wants his brother to study at university and supports him with the money earned from the murders. Once studies finished, the good brother becomes a policeman and discovers his brother's job. What is he going to do?

After being released from prison, Ouyang vowed to become a good citizen, helping his mother work and save money to marry the woman he loved. However, one day, he accidentally killed the younger brother of a crime boss, forcing him to confront and eventually kill the notorious gangster. His reputation then grew and he began a journey of suppressing various gangsters, until one day he established himself as a crime boss.