Yokoda is the latest in a series of subjects of an experiment involving transferring life force to an android body. The experiment has failed several times before, but this time, it succeeds, and Yokoda's is now reborn as 8 Man. 8 Man has several abilities, like super speed and the ability to shift appearances. Shifting his appearance to Yokoda's, he takes the alias 'Hachiro Azuma'. Keeping this aspect of himself a secret to everyone but a select few, 8 Man fights all manner of criminals - even the very ones who murdered him.