藏獒波弟（郭麒麟 配音）在山村长大，本该子承父业担当村庄卫士，却爱上了现代摇滚乐。为了追求音乐梦想，他进入城市，寻找乐队未果、拜师学艺受挫、屡遭狼群算计，但他坚持不懈，不仅拯救村民，还弥补了亲情上的裂痕，最终梦想成真。When a radio falls from the sky into the hands of a wide-eyed Tibetan Mastiff, he leaves home to fulfill his dream of becoming a musician, setting into motion a series of completely unexpected events.