After gobbling a strange looking mushroom, a squirrel has a stomachache. Frightened, he sets off to find out how he can live a healthy life for a long, long time. He asks many creatures known to have lived long, but cannot find an answer… until he meets a mayfly. What does he learn from the mayfly about life? Funny but still philosophical, this story also introduces traditional symbols of longevity illustrated in the Korean folk painting style.