An unfortunate encounter with a dark nebula maroons Dandy on a mysterious planet called Planet Limbo populated by bizarre beings and even more bizarre environments. As he explores the strange landscape with a man named Ferdinand, Dandy scrambles to find a way back home. Dandy denies that sadness is an absent concept in this strange world of the seemingly dead, arguing that it is impossible for sadness and happiness to be entwined. Struggling with his memories of how he ended up on Planet Limbo, Dandy later meets a girl named Poe, who gives him an insightful look on life and death from her perspective of the planet. Poe sends Dandy to a different dimension back to the Aloha Oe where he never encountered Planet Limbo. This episode has a drastic change from the typical sound and art style, while its somber mood and alien design contrast sharply with the typical upbeat feel and vibrant comedic styles.