Ursula is a fat pony. She does not have a long life. However, she has a long and productive death, and her namesake alters the world forever. I am not sure what to add here without ruining the plot, so readers who venture beyond this point beware! ... The story involves Ursula, a "maggot" born from the body of Ursula, who enters the world of ponies, eventually learning the value of friendship, and even love.