北宋年间，在陷空岛上，住着五个结拜兄弟，他们的绰号是“五鼠”，而江湖南侠展昭因为保护包公有功被宋仁宗赐给了“御猫”的封号。当时的奸贼太师庞吉非常妒恨包公，于是故意派人挑拨包公让仁宗赐展昭“御猫”，就是要灭掉“五鼠”。五位义士很恼火，要去东京与展昭一决高下。在去往东京的途中“，五鼠”知道了庞吉之子庞昱在陈州的很多恶行，决定先去陈州惩治庞昱。想彻底铲除奸臣庞吉、庞昱，包公只能另施一计，他让展昭假装赌输掉钱，庞吉就利用此事救了展昭，并将他送往陈州助庞昱一臂之力。展昭就用仲元的身份混进庞昱府中，搜出了很多庞昱的犯罪证据。“五鼠”与展昭里应外合，更是为包公洗脱了冤情，又把庞昱斩首，为陈州百姓铲除了这个无赖

During the Northern Song Dynasty, on the empty island, there lived five sworn brothers who were nicknamed "Five Rats". Song Renzong gave him the title of "Royal Cat" because of his meritorious service in protecting Baogong. At that time, Pang Ji, the traitor grand master, hated Baogong very much, so he deliberately sent people to provoke Baogong to ask Renzong to give Zhanzhao the "Royal Cat", in order to destroy the "Five Rats". The five righteous men were very annoyed and went to Tokyo to compete with Zhan Zhao. On the way to Tokyo, the "Five Rats" learned of many evil deeds of Pang Yu's son Pang Yu in Chenzhou, and decided to go to Chenzhou to punish Pang Yu first. Wanting to eradicate the treacherous ministers Pang Ji and Pang Yu, Bao Gong had no choice but to use another strategy. He asked Zhan Zhao to pretend to lose money in a bet. Pang Ji used this to save Zhan Zhao and sent him to Chenzhou to help Pang Yu. . Zhan Zhao used Zhong Yuan's identity to infiltrate Pang Yu's residence, and found a lot of Pang Yu's criminal evidence. The "Five Rats" cooperated with Zhan Zhaoli Yingwai, and even cleared the grievances of Baogong, and beheaded Pang Yu, eradicating this scoundrel for the people of Chenzhou