Haunted by the vision of a spectral General Zod seeking salvation, Superman embarks on a perilous journey into the Phantom Zone, where Kal-El discovers an army of deadly Brainiac drones! Superman soon learns that Val-Zod, the Superman of Earth-2, has also been lured to the Zone by ghosts from the past. Although powerless in the Phantom Zone, the Men of Steel, donning protective Kryptonian armor suits, vow to vanquish Brainiac and the menacing mechanical army.