Once in a magical forest, there lived a beautiful unicorn named Sparkle. Sparkle had a shimmering white coat and a horn that sparkled in the sunlight. One day, Sparkle discovered that the rainbow in the sky had disappeared. Worried about the missing rainbow, Sparkle decided to embark on a journey to find it.

As Sparkle trotted through the forest, she encountered various animals who were also concerned about the lost rainbow. A wise old owl told Sparkle that the rainbow had been taken by a mischie gnome who lived deep in the enchanted woods. Determined to bring back the rainbow, Sparkle followed the owl's directions and soon reached the gnome's lair.

The gnome, named Grumble, was surprised to see Sparkle standing at his doorstep. He admitted that he had taken the rainbow because he wanted to make his garden the most colorful in the forest. Sparkle explained to Grumble that the rainbow belonged to everyone in the forest and that it needed to be returned to the sky.

Moved by Sparkle's words, Grumble handed over the rainbow to Sparkle. With a flick of her magical horn, Sparkle sent the rainbow back up into the sky where it belonged. The forest was once again filled with vibrant colors, and all the animals rejoiced.

From that day on, Sparkle and Grumble became unlikely friends, and the rainbow shone brighter than ever in the sky above the magical forest. And Sparkle was hailed as a hero for bringing back the lost rainbow.