The main story of the game goes about the legendary trio Tornadus, Thundurus, and Landorus that are shown in their Therian Forme in the game.
The game is not for free unfortunately. You can buy the app for ¥300, $3.75, £2.63 and €3 in the Nintendo eShop.
Professor Burnet is a Pokémon Professor who is researching the three legendary Pokémons: Tornadus, Thundurus, and Landorus. You can help her by making her research complete by collecting Dream Orbs to unlock more extensions, featured and more information about the legendary trio. Also you can upgrade your gadgets to gather Dream Orbs to find more Pokémons and Items, evenly also more Dream Orbs to discover more Pokémons.
There are two different colors of Orbs: A pink colored orb and a green colored orb.