Considered one of the most significant discoveries in scientific history, geneticists have successfully developed a test that can accurately predict the exact date of a person’s death. Detectable from birth, it has been discovered that humans are in fact predisposed to every conceivable disease, virus,germ, and bacteria. Through a simple blood test, scientists can determine, barring any unforeseeable circumstances such as accidents or murder, the exact date that you will die. With this test readily available, everybody on Earth is faced with the same question: Do I want to know? Based on actual scientific research, Mayfly chronicles the day of the first man to receive the results of this monumental test; results that will undoubtedly change the rest of his life forever.