在这部DTC-温泉纯情篇-from HiGH&LOW剧情/喜剧片中,阿檀（山下健二郎）、阿铁（佐藤宽太）、千晴（佐藤大树）3人（DTC）为了追求激动的心跳和青春(与女子)，连目的地都没有决定就骑着摩托车去旅行了。但是很快，随身携带的钱就用完了，在温泉街的旅馆做日工兼职。在那里遇到老板娘·玛丽(笛木优子饰)和独生女·小惠(新井美羽)。玛丽的丈夫死后，她一边抚养女儿一边掌管旅馆，千晴对她的爱慕之情愈演愈烈。但是，玛丽却和总管宫崎(骏河太郎)互相吸引着。由于担心女儿在意，他们无法下定决心再婚。三人在同伴竖笛兄弟(八木将康、天野浩成)以及曾经战斗过的SMG(广濑智纪、松田凌、西村一辉、西川俊介)和达摩babys(水野胜、田中俊介、守屋光治、井泽勇贵)的协助下，将执行一项作战。最终，DTC异想天开的纯情旅行的结局是？
Dan, Tettsu and Chiharu (DTC) were exhausted after all those exciting days. Yet what awaits them is an extremely boring life. In order to seek for excitement and youth (and girls), the trio goes on a motorcycle trip without a specific destination. But they soon spend all their money and have to do part-time jobs in a hotel at the hot spring resort... There, they meet the young proprietress Mari and her only daughter Megumi. Chiharu grows fond of Mari who takes care of her daughter and runs the hotel alone after her husband died. However, Chiharu knows that Mari and the head-clerk Miyazaki are attracted to each other. To help the two who cannot get married because of her daughter, the trio decides to carry out a certain plan with the assistance from their friends the Tatebue Brothers as well as SMG and Daruma Babies who used to be rivals! What is the end of DTC's unbelievable pure trip...?
