Imagine a school where you meet your own unicorn and have amazing adventures together! That’s what happens for the girls at Unicorn Academy on beautiful Unicorn Island. Following the purple tornadoes that threatened Unicorn Academy, and amidst reports of freak high tides, flooding and earth tremors, Amethyst dorm join the rest of Unicorn Academy on a field trip to the coast. But when Phoebe makes up a story to lead Alice on in her investigations of the floods, the dorm become very upset. How can Phoebe and Shimmer make up with the others and help to save Unicorn Island?