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.