Many children in the Kingdom of Locke suddenly contracted a strange dental disease, and even Princess Kelly fell ill. Thus, Principal Griffin told Locke and Felt that, relying on their determination, they must find the legendary guardian beast—the "Unicorn Pegasus"—to obtain the magical solution. Therefore, in search of the Unicorn Pegasus, Locke and Felt, along with their pets, journeyed to a magical kingdom—the Yayale Kingdom. With the help of four spirits in the "Yayale Kingdom"—Pipi, Tiantian, Yaya, and Wangcai—Locke and his companions overcame challenges and defeated various dental demons and bacteria. Ultimately, they found the Unicorn Pegasus, cured the students' oral problems, and taught them to use Yayale toothpaste while maintaining the good habit of brushing their teeth morning and night. The Kingdom of Locke returned to its former peace, and the king led the citizens in holding a grand Guinness Dental Protection Awards ceremony. At the ceremony, various small animals from nature known for dental protection participated: snails were recognized as the animals with the most and strongest teeth, while squirrels and moles were honored as the animals with the sharpest and most formidable teeth. Of course, the Dental Protection Award was rightfully won by Yayale, and Pipi, Tiantian, Yaya, and Wangcai were knighted as Dental Protection Knights, bestowed with honorable titles. They are now set to embark on a new journey of dental protection!