An apprentice arrives at the Battlespire, a legendary fortress suspended within the daedric realms where aspiring war-mages undergo their final trials before joining the Imperial battlemages, only to discover the academy under siege. The demonic Mehrunes Dagon and his daedric forces have slaughtered the instructors and students, transforming the Battlespire into a beachhead for an invasion of Tamriel itself. Left as the sole survivor, the young mage must navigate the corrupted fortress and venture into the nightmarish depths of Oblivion, battling otherworldly creatures and unraveling the Daedric Prince's sinister plans. Racing against time and armed only with their magical abilities and wits, the apprentice becomes the last barrier standing between Dagon's army and the mortal world.