Zhan. gu (2007)

A movie that combines the stunning art of Chinese drumming with Triad dealings?
This compelling story follows Sid, a reckless rascal who is raised in a Hong Kong triad family. He flees to Taiwan upon enraging a mob boss. Hiding out in the mountains, he encounters and joins a group of drummers whose mesmerising art, rigorous physical training, and austere way of life eventually transform him into an extraordinary young man. Sid's independence from the triad life is profoundly challenged, however, when a twist of fate awaits him back home in Hong Kong and forces him to choose between loyalty to his family and his new found faith in himself.