USER: Write a concise summary of the following. Be sure to preserve important details: In Greek Mythology, Orpheus was the greatest lyre player in the world. He could charm rocks and rivers with his music. When Orpheus fell in love with Eurydice, he wooed her with his song. Their marriage was brief, however, as Eurydice was bitten by a viper and died shortly after. Devastated, Orpheus journeyed to the Underworld to convince Hades and Persephone to return his bride to him. Orpheus managed to pass through Cerberus, the three-headed dog who was the guardian of the gates, by making him fall asleep with his music. When he played his lyre, the king and queen of the Underworld were moved by his song, and they agreed to let Eurydice live again on one condition: she would follow him while walking out to the light from the darkness of the Underworld, but he should not turn to look at her before she was out to the light. As they started ascending towards the living world, Orpheus began to think it might all be a trick, that the gods were just making fun of him and Eurydice was not really behind him. Unable to hear Eurydice's footsteps, Orpheus finally lost his faith and turned to look back, only a few meters away from the exit. Eurydice was in fact behind him, as a shade that would become flesh again when she was back into the light. After Orpheus looked at her, Euridice's shade fell back into the darkness of the Underworld, now trapped in Hades forever.