The Osiris myth is the most elaborate and influential story in ancient Egyptian mythology. It concerns the murder of the god Osiris, a primeval king of Egypt, and its consequences. Osiris's murderer, his brother Set, usurps his throne. Meanwhile, Osiris's wife Isis restores her husband's body, allowing him to posthumously conceive their son, Horus. The remainder of the story focuses on Horus, the product of the union of Isis and Osiris, who is at first a vulnerable child protected by his mother and then becomes Set's rival for the throne. Their often violent conflict ends with Horus's triumph, which restores Maat (cosmic and social order) to Egypt after Set's unrighteous reign and completes the process of Osiris's resurrection.