One day, in the family manor, four cousins discover a passage leading to a mysterious world. Trapped in this unearthed land, the Kingdom of Keoherus, they must confront the Guardian of Time, face dark forces and beasts to hopefully get back home.

One day, in the family manor, four cousins discover a passage leading to a mysterious world. Trapped in this unearthed land, the Kingdom of Keoherus, they must confront the Guardian of Time, face dark forces and beasts to hopefully get back home.