John Foster and Kenneth Grainger are a couple of Englishmen stationed at a teak wood post. When Foster's fiancée, Mary Trevor, writes him that their engagement is off, he goes off to Mandalay.
A beautiful Russian spy seduces an Austrian military officer in order to obtain secret plans. When she falls in love with him, both are placed in danger.
尽管他的被谋杀的朋友在所有人看来都是一个无赖,一个真正的“无赖”,爱德华·威尔士决心通过举行一个降神会来捕捉他的杀手,使用一位著名的灵媒。13 个降神会参与者中有许多人有杀人的理由和手段,其中一人利用黑暗的掩护再次杀人。当灵媒的亲近之人被怀疑时,她变成了侦探,希望能揭露真正的凶手。