Once upon a time, in the sunny city of Murcia, there lived a 6-year-old girl named Martina who loved princesses and unicorns. She lived with her family and every corner of their home was filled with laughter and joy. Her room was a kingdom of dolls, with castles and magic wands everywhere. She would often dress up as a princess and dance around, her imagination taking her on grand adventures.

One night, as Martina was sleeping, a sparkly light appeared. It was a magic fairy called Azura, who needed her help! 'Martina,' said Azura, 'in the world of magic, a Rainbow Unicorn needs you! Will you become Princess Vayana and save the day?' With a nod, Martina was suddenly dressed in a beautiful gown, and her grand adventure began.

Princess Vayana found herself in a magical land where the trees were candy and the rivers sparkled. She met her parents, King Jaime and Queen Laura, along with her grandparents, uncles, aunt, godfather, and cousins. They were all there to help her. They told her the Rainbow Unicorn was trapped in a dark castle far away, and together, they formed a rescue team.

They traveled through fluffy cloud mountains and sparkling waterfalls, with Vayana leading the way. She sang songs that made the flowers dance, and her cousin Felipe kicked his soccer ball to scare away grumpy goblins. Cousin Fernanda drew bridges with her paintbrush, and Diego helped the team swim across the giggling waters of Gummy Bear Lake.

As they approached the dark castle, Grandpa José told wise stories, making the trees whisper secrets, and Grandma Pura healed scraped knees with her special ointment. Aunt Loly and Uncle Daniel cheered everyone on, while Godfather Guillermo told amazing jokes to keep spirits high. The family's laughter was so powerful, it lit up the sky!

Finally, at the castle, they found the Rainbow Unicorn, with its horn stuck under a magic spell. 'To free the unicorn,' said Aunt Cristina wisely, 'we must all do our chores without fuss and with happiness!' So, everyone picked up their tools. Vayana remembered her Mom's words about cleaning up and listening, and she worked harder than ever.

With teamwork, the spell was broken, and the Rainbow Unicorn was free. It thanked them, showering the castle with glittering colors. Vayana and her family rode on the Unicorn's back, soaring across skies painted with dreams and stars. They returned home just in time for bed, with Vayana promising to be more helpful and to always listen to good advice.