In the beginning there was only water, and one egg, that egg hatched, Ra came out, he wanted to be important, so he decided to be the sun.
Ra created gods and goddesses, he loved them all, however his favorite one was Osiris, Osiris was the brother of Set, who was very jealous of all the things Osiris had. Osiris' wife was Isis.
Set got so mad that he took Osiris and ripped him apart and threw him into the Nile River.
Isis tried to get him fixed by wrapping him with lined cloth, but she couldn't, Ra said that he would be the leader of the land of the dead.
Set's nephew got so mad at him for killing Osiris that he killed Set.
Every day Isis goes to the Nile River and cries, because she will never be able to see he husband again, she will always live and he will never come back from the dead. The river floods because she cries into it everyday.