In an era after the 1960s, the authorities of the "outer planets" sent the famous secret agent Lemmy Caution on a mission to Alphaville, a dehumanized city a few light years away from Earth. Caution is in charge of neutralizing Professor von Braun, the almighty master of Alphaville, who has abolished human feelings there. A computer, Alpha 60, governs the entire city. A message from Dickson, an ex-secret agent, orders Lemmy to "destroy Alpha 60 and save those who are crying". But he is kidnapped, interrogated by Alpha 60 and sentenced to death...