陈查理潜入黑夜，破解谜团揭真相。艳婢桃儿包书

　　A scientist working on an important new invention which will protect Allied shipping from U-boat torpedoes has been assigned Secret Service security protection. Amazingly, despite the fact that his laboratory and experiments are located on the upper floor of his Washington mansion, he decides to host a cocktail party for friends on the first floor. Even though several of his gu... (展开全部)