Following the events of the
"Brainiac" story arc, the entire city of
Kandor now resides near the
Fortress of Solitude in the North Pole, populated by 100,000
Kryptonians. Although distracted by the recent death of
Jonathan Kent, Superman attempts to aid the Kryptonians in their assimilation with the rest of the Earth. Few Kryptonians seem interested in this, including the city's leaders,
Zor-El and
Alura, Supergirl's parents. After the first televised meeting between the
President of the United States and a delegation from Kandor is interrupted by a rampaging
Doomsday, Zor-El and Alura form a task force determined to preemptively end any future threat to Kandor by capturing Superman's worst villains and trapping them in the
Phantom Zone. However, when several human police officers refuse to hand over the
Parasite, they are killed by the task force, enraging Superman. At the same time,
Lex Luthor, who has been recruited by General
Sam Lane to halt the Kryptonian "invasion", gains control of
Brainiac and unleashes his robot army from within the depths of the alien's spaceship, currently being held in Kandor. During the fight,
Metallo and
Reactron, who are working for Luthor and General Lane, are brought into Kandor as
Trojan horses containing
kryptonite. Reactron manages to kill Supergirl's father, Zor-El. Alura's anger causes her to denounce humanity. Members of the
Justice League and
Justice Society arrive in Kandor, led by the
Guardian demanding the city turn over those who murdered the police officers, and a large-scale battle erupts, with Superman in the middle. It only ends when Kryptonian scientists manage to use Brainiac's technology to lift Kandor off the Earth and grow an entirely new planet underneath it, called "New Krypton", on the other side of the
Solar System, directly opposite the Earth, and therefore hidden by the Sun. Alura tells Superman that he is not welcome on New Krypton, although Supergirl takes up residence there with her mother. In the end, Alura frees
General Zod from the Phantom Zone to help her lead their people. ==New characters==