讲述大力丸是一位国际刑警与自己的助手接受命令，追查罪犯三哥，由于被东京犯罪组织的领袖松本横插一杠，又将自己的助手维奇挟持。大力丸向自己的上司曹警官寻求帮助，找到5个好友鹧鸪菜、大地生、犀牛皮、花旗参、罗汉果共同协助自己。此外还有女警官胡督察一同前往东京。路途当中5个人对胡督察嘘寒问暖，想要得到胡督察的青睐，5个人开始各出奇招。这5个人刚开始其实都不愿意帮助警察大案，但是无奈的情况下，只能听从警察安排，执行任务过程当中看上胡督察，暗中与对方交朋友。5个人到达东京之后，鹧鸪菜在罪犯家里发现忍者的存在，然后他们做出最后的反抗。罗汉果则是帮助其他好友努力完成任务，假扮香港游客进入当地赌场，各司其职开始着手调查

Talking about Daliwan, an Interpol and his assistants who accept orders to track down the third brother of the criminal. Then he took his assistant, Vicky, hostage. Dali Wan asked his superior, Police Officer Cao, for help, and found five friends, Partridge, Dadisheng, Rhinoceros Hide, American Ginseng, and Luo Han Guo to help him. In addition, a female police officer, Inspector Hu, went to Tokyo together. During the journey, 5 people greeted Inspector Hu with his health, and wanted to win Inspector Hu's favor, the five people began to come up with their own unique tricks. These five people were actually unwilling to help the police with major cases at the beginning, but in desperation, they could only obey the police's arrangement. During the mission, they fell in love with Inspector Hu and secretly made friends with him. After the five people arrived in Tokyo, Partridge found the existence of ninjas in the criminal's house, and then they made their last resistance. Luo Han Guo is helping other friends to complete the task, pretending to be a Hong Kong tourist and entering the local casino, performing their own duties and starting to investigate