In a world where science is replaced by magic, youngsters attend wizardry schools to learn the art of magic, and the most prestigious of them all is the Tower of Silver Star. Only the most gifted, attend this school to learn from Dummel Drusk, the legendary wizard who once defeated the evil overlord that occupied the Tower.

The game story opens with Lillet Blan, a student at the Tower of Silver Star is notified about the horrible event that occurred during her 5 days away. She is told that everybody including students and professers were all killed. Now Lillet Blan must investigate the magical tower to uncover what occured during the 5 days she was gone.

• In GrimGrimoire, Lillet the main character will not directly fight. Instead you will summon elves and fairy units to fight for you.
• Mana is needed to summon units and cast spells. To gain mana you must collect mana crystals that are on the battle field. So effectively command your units to collect and store mana crystals. Caution: Enemy units will try to collect the mana crystals as well, so defend your territory!
• There are 4 major magic types to master in GrimGrimoire: Glamour, Necromancy, Sorcery and Alchemy. Each have their own unique abilities and summon different types of units.