“武松打虎”的传统戏码每天都在小剧场上演，“机械萌虎”扮演者李多多却不甘于每日循规蹈矩，一心想成为功夫明星。在小剧场演出的空闲时间，他穿梭在各个片场，为梦想加倍努力。通过他的不懈坚持，李多多的才华终于得到了大家的认可，却在无意间发现惊天黑幕，令曾经也是功夫巨星的父亲深陷危机。为了正义与亲情，李多多与他曾经的伙伴“机械萌虎”再次合体，变身“萌虎特工”，向独裁者发起终极挑战。The plot follows Kung Fu kid Dodo Lee, who dreams of being a star at Oscar Lei's studio but is stuck as a puppeteer in his never satisfied father's show. When Dodo encounters super star Kitty Mo, dream and reality clash and the pair find themselves in a fight between good and evil orchestrated by the power crazed Oscar.