Commissioner Lohmann is already planning his holidays. An unexpected phone call calls him back to work. A member of Interpol was murdered. The head of an organisation wants to come into contact with the gangster organisation of chicago. But who is this? Mysterious murders happen and all trails lead to a penitentiary. But there is Joe Como, FBI agent, who is helping commissioner Lohmann. But soon Lohmann doubts Comos' identity. When Lohmann sees the name of Dr. Mabuse mentioned in a book found by a victim he believes that Dr. Mabuse is the mind behind the crimes... 　　译文(2): 罗曼局长已经在计划他的假期了。一个突如其来的电话叫他回去工作。一名国际刑警被谋杀了。一个组织的负责人想要接触芝加哥的黑帮组织。但这是谁？神秘谋杀案时有发生，所有线索都指向监狱。但还有乔 · 科莫，联邦调查局探员他在帮助罗曼局长。但很快罗曼怀疑科莫斯的身份。当罗曼看到马布斯医生的名字出现在一本被受害者发现的书里他相信马布斯医生是这些罪行的幕后黑手。