There they meet Cerebella, an advanced guardian who reveals an incredible truth. Every person's creativity shapes a unique world within the Imaginarium, and when imagination weakens, those worlds begin to fall apart. Even more alarming, a powerful force known only as The Reality is determined to erase imagination forever.

Chosen because of their unusually creative minds, the six students become the Guardians of Imagination. Taking on new identities and learning to create tools, weapons and abilities from their own imagination, they begin protecting the fragile worlds hidden inside the human mind.

Their first mission leads them into the fractured mindscape of Zoe, a nineteen year old trapped in an endless loop created by grief and overwhelming thoughts after losing her father. What begins as a rescue mission teaches the team that not every battle is won through combat, and that healing a mind can be just as difficult as defeating a monster.

As they return to everyday school life while secretly carrying out missions inside the Imaginarium, the Guardians are assigned a far more dangerous case. A world famous fourteen year old creative genius, whose stories and animated worlds have inspired millions, is watching his imagination collapse under crushing pressure. His once thriving civilization of heroes, creatures and impossible ideas begins to crumble, threatening to erase everything he has ever created.

Determined to save him, the team unlocks Hero Mode, awakening extraordinary powers that push them further than ever before.

But during the mission, they come face to face with the greatest threat the Imaginarium has ever known.

The Reality.

For the first time, the Guardians discover that they are fighting an enemy far beyond anything they imagined, and that some battles cannot be won.

When the mission ends in tragedy, its consequences spill into the real world, leaving behind unanswered questions, dangerous secrets and a discovery that changes everything the team thought they knew.

Because by the end of Book One, the greatest danger isn't simply that imagination is under attack.

It's that the enemy may already be much closer than anyone realizes.