In the historic melting pot of 19th century New York City, Fievel and the Mousekewitz family are struggling to make their American dream come true. But when a mysterious treasure map leads Fievel and his friends to a secret world of Native American mice living beneath the city, he finds something even more precious than gold and jewels!Amy（吴君如 饰）荣立功勋将Madam胡（胡慧中 饰）肆意整治，醒来后却发现是南柯一梦……霸王花队伍迎来了Susanna（叶子楣 饰）、Joey（罗美薇 饰）等新鲜血液，Amy与May（惠英红 饰）众人怎能放过拿新人寻开心的好机会？于是霸王花营地一时剑拔弩张，后经互相了解终于一致决定为Madam胡筹办生日宴会。飞虎队简Sir（冯淬帆 饰）对Madam胡一往情深，可惜嘴拙舌笨一直落于竞争者卢Sir（黄锦燊 饰）之后，这次生日宴自然是表现的大好机会，以阿南（楼南光 饰）为首的一班飞虎队亦对此次聚会兴致勃勃，搞出笑料连场。 不久国际恐怖分子金毛狮一伙赴港搭救同伙，霸王花与飞虎队联袂出击，而简Sir终于在这次行动中迎来了自己的爱情……
