Two years after the twin worlds of Sylvarant and Tethe'alla were merged into one, the land is thrown into turmoil. Maps have become useless, climates have gone wild, and old tensions between the two peoples have boiled over into open conflict. When the Church of Martel clashes with an insurgent group called the Vanguard, the city of Palmacosta is caught in the crossfire and burned in a massacre remembered as the Blood Purge, an atrocity blamed on the hero Lloyd Irving. Among the survivors is a timid boy named Emil Castagnier, who watches his parents die and vows to find answers. His path soon crosses with Marta Lualdi, a girl carrying the mysterious Core of Ratatosk, the slumbering spirit whose disturbance has thrown the world out of balance. Pledging himself as a Knight of Ratatosk, Emil sets out with Marta to restore harmony to a fractured world.