Locked away in an asylum for a decade and teetering between life and death, the criminal mastermind Dr. Mabuse has scribbled his last will and testament: a manifesto establishing a future empire of crime. When the document's nefarious writings start leading to terrifying parallels in reality, it's up to Berlin's star detective, Inspector Lohmann, to connect the fragmented, maddening clues in a case unlike any other. The Testament of Dr. Mabuse appropriates slogans and ideas from the newly ascendant Nazi party and puts them into the mouth of a madman, warning the audience of the horrible menace that was rapidly becoming a reality.