In 1905, revolutionist Sun Yat-Sen visits Hong Kong to discuss plans with Tongmenghui members to overthrow the Qing dynasty. But when they find out that assassins have been sent to kill him, they assemble a group of protectors to prevent any attacks.

Ran (Fiona Sit) is a 23 year old girl that is burden with caring for her older brother Feng (Cheung Kwok Keung) who has a fatal hereditary disease called Arteritis that paralyzes the entire body. She also has to raise and care for his 6-year old daughter Shiayou (Cheung Ching-yu). Feng's wife had taken the entire family savings and left them when she found out he was diagnose with his illness. Ran must take in work as a seamstress at home to make a living and make ends meet. She cares for her brother and niece by day and works throughout the night to rush her work deadline. She doesn't have an easy life so she always has a depressive and sad expression on her face. To make matters worst Ran is afraid one day she or Shiayou will end up like her brother since his illness is hereditary.

A corrupt red oil kingpin enlists the aid of a female police officer to help find his son.