William is an unsuccessful guinea pig for a medical group interested in researching the common cold. He is soon fired and offered a job by the nearby National Atomic Research Center where they figure anyone who could fail at being a guinea pig is just what they need. They con William into thinking he will continue his guinea pig career by testing out some equipment for them before they send a group of astronauts to the moon.

In 1908 London, a women's rights campaigner discovers the Assassination Bureau Limited, an organization that kills for justice. When its motives are called into question, she commissions the assassination of its chairman. Knowing that his colleagues have recently become more motivated by greed than morality, he turns the situation into a challenge for his board members: kill him or be killed.