Spoilers warning ahead.
The third Taiko game for 3DS's Story Mode stars the Taiko siblings Don and Katsu traveling the world in order to help a couple of new companions: the sorceress Tia and the monkey-like creature Popokaka.
Emerging from a giant plate during a museum visit by the drum brothers, the two seek help as planet Earth's balance is in danger! Six powerful artifacts known as the Mystery Items are missing from their original locations and odd incidents are happening all over the world as a result, due to the items being originally used to seal the power of other-wordly, dragon-like creatures known as the Ryuumyaku, which inspired folklore legends all over the world across the ages. The mayhem has been caused by the actions of members from Hexaglia, a secret mage-powered society who seeks the Ryuumyaku's powers for their mischievous purposes.
The Mystery Adventure mode inherits the Story mode mechanics of Don to Katsu no Jikuu Daibouken's adventure, with the return of Clash notes from Wii 2 (for random battles only), up to 8 different members to be employable for battles and the possibility to use magic to grant several perks to the whole party.