Introduction of Princess Magnolia: The story begins by introducing Princess Magnolia, who is known for her royal duties but secretly moonlights as a superhero known as the Princess in Black. She fights monsters and protects her kingdom without anyone knowing her true identity.

Monster Invasion: One day, while attending a tea party, Princess Magnolia receives word that monsters are attacking the kingdom. She quickly transforms into the Princess in Black and rushes to confront the monsters threatening the goats in the goat pasture.

Battle with the Monsters: The Princess in Black arrives at the goat pasture and battles the monsters, led by a big blue monster named Frimplepants. Using her ninja skills and quick thinking, she defeats the monsters and saves the goats from harm.

Secret Identity Maintained: After defeating the monsters and ensuring the safety of the kingdom, Princess Magnolia returns to her royal duties as if nothing happened, keeping her secret identity as the Princess in Black hidden from everyone, including her best friend, Princess Sneezewort.