在纽约的唐人街,一位脾气难搞、烟不离手,且最近刚丧夫的八旬奶奶,决心要以独立女性的面貌展开新人生,不过她的儿子却很担忧,希望她搬来布鲁克林高级住宅区和他一家人一起同住。奶奶住家附近的一位算命师铁口直断说,奶奶未来好运锐不可当,奶奶便决定跳上公车,直奔赌场。她在赌桌上失利,但搭公车返家的路上,一大袋如假包换的钱竟掉落在她腿上,她索性带了这袋钱回家。这件事引起地方黑道觊觎,奶奶只好顾请贴身保镖保护自己,也就此卷入了地方上的帮派恩怨中。In the heart of Chinatown, New York, an ornery, chain-smoking, newly widowed 80-year-old grandma (Tsai Chin) is eager to live life as an independent woman, despite the worry of her family. When a local fortune teller (Wai Ching Ho ) predicts a most auspicious day in her future, Grandma decides to head to the casino and goes all in, only to land herself on the wrong side of luck-suddenly attracting the attention of some local gangsters. Desperate to protect herself, Grandma employs the services of a bodyguard (Corey Ha) from a rival gang and soon finds herself in the middle of a Chinatown gang war.