Bullet in the Head (1990)

Set during the Vietnam war, the film follows B, Fai and Wing (iconic actors Tony Leung Chiu-Wai, Jacky Cheung and Waise Lee), three best friends fleeing from Hong Kong to seek their fortune as smugglers. In Saigon, they join forces with fellow expat Lok (Simon Yam) and double-cross the ruthless gangster Luong to steal his gold and rescue nightclub singer Sau-ching (Yolinda Yan) from his clutches. The gang must fight their way out of the country in a nightmarish odyssey where each new battle pushes them beyond their limits and threatens to destroy their friendship.