In 2083, six impossibly tall towers appeared on Earth, offering power and treasure while slowly unleashing monster waves that wiped out civilization. The sole survivor Jason uses his wish to return to the year when he first entered a tower — twenty years before the catastrophe — with all the combat instincts of a veteran but none of his former power. His goal: gather allies and grow strong enough to save humanity before the waves become unstoppable.

Jason is driven, strategically brilliant, and quietly haunted by two decades of grief and failure. He hides his foreknowledge behind a secret identity — 'Index' — while working relentlessly to change outcomes he couldn't prevent the first time. Despite his focus, his relationships with Roy and Olivia reveal genuine warmth beneath the mission.

Across three books Jason races to reunite key allies, build a global tower-climbing alliance, and confront the architect behind the towers' destructive purpose. His foreknowledge is both his greatest asset and his deepest burden — the more he changes, the less he can predict. The trilogy builds from personal power-leveling to world-saving coalition warfare, culminating in an epic confrontation with the tower's god-level guardian.