On a business trip to Tokyo, Sebastian explores the city with a mysterious woman he keeps running into wherever he goes, discovering heartbreakingly that the truth, and the past, are as elusive as love.

Childhood friends Tetsuo and Kaneda are pulled into the post-apocalyptic underworld of Neo-Tokyo and forced to fight for their very survival. Kaneda is a bike gang leader, and Tetsuo is a member of a tough motorcycle crew who becomes involved in a covert government project called Akira. But a bloody battle ensues when Kaneda sets out to save his friend.