Kai of the Sorcerer's Tower is among the final mages in existence, clinging to survival in a world dominated by creatures shrouded in darkness—where magic's golden age has long faded and dead mana has poisoned most territories. Desperate to restore his dying world and honor his master's final request, Kai performs a forbidden ritual that gambles with his very soul, fracturing his essence to pierce through time itself. He seeks an era before mana corruption consumed everything—a world still brimming with magical potential. The ritual backfires. Instead of reaching the timeline he intended, Kai awakens thousands of years in the past, inhabiting the body of Arzan, a young lord. But salvation comes with complications: his new host was recently assassinated, leaving Kai to face an imminent beast wave threatening the territory. Hunted by threats both immediate and mysterious, he must rebuild his former power in a civilization where magic remains crude and technology is primitive. Yet Kai possesses knowledge of a future yet to unfold. With it, everything—including destiny itself—might change.