In the beginning, Enkai created the father of Maasai and gave him a stick for cattle herding. Maasai had a daughter and the task of taking care of the cattle and the god Enkai was passed on to her. You ask only for the summary of the beginning of the story, and it usually starts with an introduction so the answer must be, the father of the Maasai introduces his daughter, explaining how the daughter and sons of the tribe care for the cattle and the sky god Enkai.