She's known worldwide as The Smartest Pony In The World, and everypony knows it! After solving the conspiracy that surrounded the city of Nawlans, Morning Meir is back with her biggest, most insane case yet! After her parents go missing, Morning Meir travels to the tropical Island paradise of The Emerald Keyes to investigate the archaeological expedition that they had been working on, in order to find them.

There she meets world famous treasure hunter and explorer, Daring Do, as she searches for her next lead on finding her father. But the two soon find themselves, wrapped in an ancient mystery centered around Clover The Clever and a mysterious sapphire known as The Heart Of Oceana. Joined by some old friends, Morning and Daring work to save the world from an ancient Mayan curse and discover what happened to Morning's parents.