Rosa is our first heroine! A tender and smiling little monster who is different from all the other monsters in her village! She loves to laugh, play, and discover new things! One day, she decides to leave the place where she was born and embark on a journey of exploration. She climbs mountains, crosses the sea, and even goes through the desert until she reaches a colorful place, with a bright sun and strange monsters. There she will meet the Beast Ball, the Yellow Bird, the Three-Legged Frog, and the Blue Little Monster. A wonderful story centered on the acceptance of diversity and its promotion as a positive element that enriches society and strengthens it. The author and illustrator Olga de Dios, who has been honored for her contribution to spreading the value of equality, uses a monster character very different from what children are used to. A girl monster, who is not scary at all, who enjoys playing and laughing, and who delights in the joy of life!