Two lost souls awaken, trapped in cages deep underground. Suddenly freed by an earthquake, they set out to escape the underworld. With no memory of their past, they ascend a towering dungeon, solving puzzles and battling demons to unlock each new floor representing a deadly sin domain. As they climb, fragments of their past return - they were once soulmates during their mortal lives. However, one fatal choice bound them for eternity in the spirit realm. They were tricked by an ancient entity. Now they have to redeem themselves and defeat their eternal warden. Will revenge save them from this curse or will they accept their fate?