In the year 1905, amid the social and political turmoil of Hong Kong under Qing Dynasty rule, a revolutionary leader named Dr. Sun Wen is targeted by assassins aiming to thwart his plans for modernization and social change in China. As Dr. Sun arrives in Hong Kong to meet with fellow revolutionaries, news of his presence leaks, prompting a deadly pursuit by imperial agents intent on ensuring his demise. Recognizing the need to protect Dr. Sun and secure his safety during his visit, a diverse group of individuals from various social strata, including businessmen, street vendors, and martial artists, unite to form an improvised but dedicated team of bodyguards. Each member brings their unique skills and deep commitment to safeguarding Dr. Sun, despite significant personal risks.

As tensions escalate and the threat from the assassins intensifies, these unlikely heroes confront a series of harrowing challenges, relying on their courage, solidarity, and unyielding determination. The narrative intricately weaves through their strategic maneuvers and the intricate cat-and-mouse dynamics between the bodyguards and the assassins in the crowded streets of Hong Kong. The film captures the spirit of sacrifice and patriotism as the bodyguards strive to uphold a cause that transcends personal interests, aiming to alter the fate of their nation. The suspense builds towards a critical juncture where loyalty and bravery face their ultimate tests.