黑帮分子阿豪靠带小姐为生，但他为人热血，保护女孩们不遗余力，又因替小弟顶包被收监一年。阿海是心怀band梦想的主唱，在理想与现实的冲突中，好友兼队友背叛单飞，剩下的队员们也要面对各自生活的问题，不得不靠做服务员、参加药物试验等等方式维持排练。阿海的女友May不堪忍受困窘，离开阿海而去。同时，出狱的阿豪被昔日的小弟殴打，两个同样落寞的男人，第一次在城市中遇见彼此。不久，阿海等人终于签约，却落入了唱片公司的债务圈套。阿豪重新跟随大哥捷哥，做起了讨债。被债务缠身的阿海得到了阿豪的帮助，后者全力支持他发行唱片，二人的梦想，终于开始起飞……

Chie Jen-Hao's Gangster Rock is a lovable mess, though more mess than lovable. It's essentially about people realising fame and fortune isn't everything as long as they're alive and have options, and while there are plenty of ways to film this sort of thing - from the stunning low-key fantasy drama of Studio 4C's Princess Arete to the laid-back coming-of-age vignettes that pepper Hong Kong and Taiwanese cinema - you generally need a compelling cast of characters and at least a modicum of professionalism to pull it off. Gangster Rock has neither. There are two stories here. One plotline follows Hau (Leon Jay Williams, Jump), a small-time gangster not long out of prison after a shakedown gone horribly wrong led to the death of his then girlfriend. The other stars (collectively) Gangster, a group of musicians working the underbelly of Taipei's club scene, where industry sharks insist the two lead