When faced with certain demise, do you flee or persevere in a lost cause? In a world plagued by enigmatic towers summoning monsters to prey on humanity, Tower Walkers endowed with unique abilities face this dilemma. On the edge of oblivion, they possess the option of employing a 'regression stone' to rewind time for a fresh start, but at the cost of diverging into an alternate reality. Defiant against this norm, resolute Tower Walker Jae-Hwan elects to defy the odds in the primary timeline, unraveling profound truths about the Tower amidst his valiant stand.