The X-Men are training in the Danger Room when they notice that Angel is late. They go to his room to investigate where they find him fixated on a news broadcast about a wild man that saved a scientist near Antarctica. Believing that he is a mutant the X-Men go to Antarctica to find the wild man. After reaching Antarctica the X-Men are attacked by dinosaurs, and eventually Savage Land Mutates. Marvel Girl is kidnapped during the fighting. The X-Men come across the wild man, who turns out to be Ka-Zar. After the X-Men help him to fight off his enemy, Maa-Gor of the Man-Ape tribe, Ka-Zar agrees to help them rescue Marvel Girl. Angel is able to find Marvel Girl but gets captured by Swamp Men. Marvel Girl informs him that they are both going to be sacrificed. Suddenly a Tyrannosaurus Rex is re