Phaethon, son of the sun god Phoebus, insists on driving his father's chariot of the sun for a day despite warnings of the danger. However, Phaethon loses control of the horses and sets parts of the sky and earth ablaze, forcing Zeus to kill him with a thunderbolt to end the chaos. The story then describes how Phaethon's mother and friends mourn his death and are transformed into swans or trees weeping amber tears.