Sliverlining has a good job, good friends and what one might consider a pretty good life. Working as a Cloud Attendant in Cloudsdale, he's able to get by on his own pretty well. But he also has a secret, something even his friends, something nopony knows about but him. On the eve of his 40th birthday, that secret is finally exposed. How the hay can somepony get to forty without earning their cutie mark?!