When the Eerie descends, humanity is forced into rule-based horror dungeons. Cole binds himself to a special system and enters St. Mary's Asylum, facing survival tests. He abides by rules, outsmarts games, and defuses crises, establishing himself with calm and skill. Framed by teammates and besieged by shadow monsters, he uses wits to turn tables, fighting alongside a friendly guardian. Cole solves puzzles and searches for an exit, defying fate to clear the impossible dungeon.