1st April is the day where we traditionally trick each other with the help of harmless lies or pranks. Even newspapers often follow the trend and print something that's obviously not true ("UFO has landed next to the White House"). If you believe the story, you're a true April Fool.
So what about writing about someone who believes what he heard or read on April Fools' Day? Maybe his whole life changes because of his mistake - he might even end up a millionaire!
What if the story were true but everyone thinks it must be a prank - can he save the world?