Quinn, Willow, Krystal and Ellabeth are Unicorn Riders - empowered to protect the land of Avamay. When Willow is injured, Ellabeth must step into the role of Head Rider and lead the Unicorn Riders on their next adventure. The girls must race to the home of the mysterious Dakkar Serpent in order to collect some of its diamond scales. But the mission proves to be more perilous than they thought it would be. Will Ellabeth be able to put her pride aside in order to complete the mission?