 Scientist Andre Delambre becomes obsessed with his latest creation, a matter transporter. He has varying degrees of success with it. He eventually decides to use a human subject, himself, with tragic consequences. During the transferance, his atoms become merged with a fly, which was accidentally let into the machine. He winds up with the fly s head and one of it s arms and the fly winds up with Andre s head and arm. Eventually, Andre s wife, Helene discovers his secret and must make a decision whether to let him continue to live like that or to do the unthinkable and euthanize him to end his suffering.