Hercules battles Superman with Olympian weapons, and finally wins with a song from Apollo’s flute that puts the Man of Steel into hibernation. To free him, Lois agrees to marry Hercules. But Venus intervenes, frees Superman from his sleep and Lois from her vow, and tells Hercules that Jupiter is displeased with him. Hercules battles Superman again, but this time Superman tricks him into returning to the past, in which Hercules loses his memory of his visit to Metropolis. Superman returns to the 20th Century.