Soldiers-for-hire Baldwin and Dugan (Vinton Haworth and Gordon Jones) land a perilous assignment -- ensuring the safe arrival of the priceless Soo diamond to a shop in Shanghai. Upon delivery, the shop is attacked and in the ensuing firefight, the diamond disappears. Aided by the local authorities, the two round up a motley crew of six unusual suspects, all found in the Chinese quarter late at night -- attractive and uncooperative Jane Dunn (Constance...