Superman's grandfather, Seg-El, learns Krypton is in danger of being destroyed so that his future grandson will never be born.

Seg is approached by a Black Zero leader as Rao finds a scapegoat for the failed Rankless Initiative.

After a failed coup, Daron punishes the conspirators. Lyta and Dev go in search of Jayna.

Seg races to save his city from being overtaken as the bottling of Kandor begins.