Princess Magnolia seems like a perfect, proper princess who loves frilly dresses and polite tea parties. But when her secret ring alarm sounds, she transforms into the Princess in Black, a superhero who secretly protects her kingdom from monsters! With the help of her loyal unicorn, Frimplepants, she must keep her identity hidden from the suspicious Duchess Wigtower while battling the mischievous goat-eating monsters from Monster Land. This fun, action-packed story shows that you can be both gentle and strong, proving heroes come in all disguises.