**Long ago, before Noah built the Ark, in an era of swords and magic, during a time of unparalleled prosperity, there arose a religion-like belief known as "Kiltia," which held the hearts of the people. However... after the great flood, all civilizations were destroyed, lost to the darkness, including the ancient texts that gathered all the knowledge — Grimgar...

It is said that whoever possesses the Grimgar will hold immense power, a power capable of changing the world. Many people sought after it, but no one ever found it. Grimgar became a legend, passed on through word of mouth, and many began to doubt if it ever existed. Yet still, those who sought power dared to continue searching for that book...

Our story begins on a cold day in the town of Saint Ivalis. March, the new transfer student; Mute, the shy and often bullied child; and Ritz, the cheerful girl who is stronger than most boys — these three children are about to encounter the power of an ancient book that will change everything in Saint Ivalis and their lives forever...**