If we succeed in turning an invisible superhero into a fluorescent superhero, then we have effectively neutralised his special powers, and left him at the mercy of his evil enemies. In Magnapolis a new product called Slurp – a green yogurt drink – is the latest craze. It has quickly become the drink everyone wants to drink, and Alan and his friends are unable to resist the temptation to try it out. Alan soon finds that behind this innocent-seeming soft drink lies an awful reality. Giant robots despatched by Wallace Morton patrol the city street in search of the Invisible Man, whose anatomy has reacted to the ingredients of the drink by turning him into a fluorescent green figure! Alan is now a clearly visible target for everyone. It’s a highly visible finale for someone who had until recently been an invisible hero ….