The Fantastic Four find out that the Invisible Woman may die in childbirth since she was altered by cosmic rays years ago. The only hope to save her is to get some negative energy, which can be found in the Negative Zone. The Thing, Human Torch, and Mr. Fantastic travel there and find Annihilus. After knocking him out, they steal his Cosmic Control Rod, since it has negative energy. Shortly afterwards though, they have to give it back to save their lives, but not before using some of the Negative Energy.