Maylia

Commissioner Michael Barrows is an American Government Agent who's in Shanghai on narcotics business. While on board a police boat he notices a ship heading to Shanghai quickly. The Captain of the ship, the Kira Maru, panics and ruthlessly sends 100 chinese slaves to a watery death. Barrows convinced that these deaths point to a huge drug smuggling operation heads to Shanghai... (imdb)

Blackie is seen leaving a Chinese laundry where the proprietor has been murdered, and must track down the real killer in Chinatown. (imdb)