Clark leaves his apartment, but Lois doesn't give him a second look.
Steel leaves his own house, leaving Nat to watch TV alone. Then the pair
carries a huge apparatus across the face of the world. Steel attempts
to explain it to Superman, but it is beyond him. All he knows is, this
machine will let them transport the ghost fortress. Setting the
machinery at the South Pole, the two stand back as the ghost fortress is
siphoned out of the air. Amidst the cords and wires of the machine, a
strange humanoid creature sits.

Somewhere in Metropolis, the Cybermoths and their leader Luna
prepare to contact the Overmind. As Luna contacts him, she tells him how
Steel and Superman formed a tesseract in Steel's lab.

After Superman decided to build his fortress in the tesseract,
the two began to modify the Steelworks to handle the task. Superman
traveled the world to collect the raw materials that would be required
to reconstruct the fortress. Then they construct a containment sphere
around the tesseract to allow them to transport it and keep people out.
Unknown to the heroes, Luna had an agent in the Steelworks the whole
time, and now he resides in the Specnap (the capturing machine).
Finishing her communication, Luna rallies the Cybermoths.

Returning to the Steelworks, Superman and Steel set the Specnap
down. Steel fires up the machinery and Superman, Kelex, and the fortress
are ejected into the tesseract. Steel suddenly begins to get some
strange readings, and asks Natasha to check out the Specnap. She finds
the Cybermoth, now integrated directly into the machinery. She begins to
warn her Uncle, but suddenly the Steelworks is filled with Moths
everywhere. They bind Steel to the wall and hold Natasha under armed
watch.

Inside the fortress, raw materials begin to pour in to
reconstruct the fortress. The particles of matter flow around Superman,
as the fortress literally rebuilds itself. It is not an exact replica,
however. The Kryptonian technology is integrating with the Earth's and
forming a hybrid. The new fortress even has a portal to the Phantom Zone.
Suddenly, Superman sees visions of battlesuits, cubic worlds, and
flying dogs. He is overwhelmed by what is happening and collapses to the
ground. Suddenly he notices a Cybermoth climbing over the portal to the
Phantom Zone, and before he can stop him the Phantom Zone is opened.
Out of the Phantom Zone comes the Cyborg Superman.

Henshaw attacks Superman as Luna and her Cybermths invade the
fortress. Outside in the Steelworks, the sudden appearance of Boris
(Natasha's friend) gives Steel the chance to escape and start beating
the hordes of Moths. Inside the fortress Superman and Cyborg continue to
fight as Luna attempts to seize the fortress. As Superman lies on the
ground, tiny Kandorians suddenly appear from out of the Phantom Zone and
rescue Superman. Kandor was saved from the destruction of the fortress
by escaping to the Phantom Zone. There they found the Cyborg, and now
they are taking him back. Free from distraction, Superman quickly stops
the two Cybermoths assisting Luna. Afraid, Luna flees, but falls into
the Phantom Zone. Superman starts to go after her, but Kelex stops him.
As he closes the portal, Superman vows one day to save Luna.

Exiting the tesseract, Superman helps Steel with the remaining
Moths. Then the two relocate the tesseract out of the Steelworks.
Opening the portal, Superman and Steel enter the fortress. Superman
walks up to a chest and produces a cape from within. On the back of the
cape, is the 'S' insignia. He hands it to Steel, his "partner" in
Metropolis. The two fly back to Metropolis together.