Wonder Boy was the last survivor of the planet Viro. He escaped his home world's explosion on a spaceship, hurling through space and time and crashing into the heart of Chicago. He survived, but when he tried to explain his origin to the local police, they didn't believe him and placed him in an orphanage. He sulked for a while, but when he heard that a Mongol warlord was trying to invade Europe, he left the orphanage and stopped the warlord's forces single-handedly. He decided to continue to use his superhuman abilities to fight Nazis and criminals.