Divine family legend
In the beginning, there was Atum, the sun, who created himself, when he stepped out from ancient waters Nun. Then Atum created Shu (god of air) and Tefnut (goddess of moisture). She separated sky and earth and gave birth to Nut (goddess of sky and heaven) and Geb (god of earth).
Nut and Geb gave birth to their sons (Osiris and Seth) and daughters (Isis and Nephtys). Osiris became the first Pharaoh. Together with Isis he ruled wisely and peacefully, he taught people reclaim the soil, bake bread and build the towns. He gave them laws and conscience to differentiate the good and the evil.
But cruel Seth wanted the throne and he murdered his brother, chopped his body to pieces and dissipated them into Nile. However, Isis refused to stoop before Seth. She collected the pieces of her husband and with the help of god Anubis (the first, who did embalming) put them together. Then Isis transformed to a falcon, was fertilized by Osiris and Horus was born.
Isis brought him up in seclusion in Nile Delta swamplands. When the god grew up, he decided to get back his legitimate inheritance and revenge his father's death. Horus challenged Seth to a duel, won and ruled the country from this time. Revived Osiris went to the darkness kingdom and he became the king of underworld.