London special agents Wong Tak-fat and Fong Lung have arrived in Hong Kong to investigate a murder in connection with a drugs trafficking ring. Fong attends a ball hosted by his girlfriend's rich father Sze Kam-wing where evidences lead him to the Black Eye Bar. Wong befriends the recently widowed bar owner Lee Mei-chen and soon becomes enlisted as member of the ring and the ring leader's trusted aide. Falling in love with Lee, Wong is told that her husband was killed for leaving the organisation. Wong is however unable to establish contact ...
