Stephen said that God appeared to Abraham and told him to go out of Mesopotamia. He also told him about the covenant of circumcision. The patriarchs sold Joseph to Egypt. There was a famine, but our fathers heard that there was grain where Joseph happened to be, so when they went there Joseph made himself known to his family. Jacob died and was carried back to Shechem and was laid in a tomb.
I'm having a bit of trouble summarizing this story, it just seems like a bunch of random details to me.
The people of Abraham multiplied in Egypt until there was another king who didn't know Joseph who killed all newborns of their group. But Moses slipped through the cracks and wasn't killed and was even raised by Pharaoh's daughter. When Moses was 40, he defended the oppressed and killed the Egyptians. He then tried to stop quarreling among his people and they asked what his authority was to tell them what to do. He then fled to live in exile in Midian where he had 2 sons.
Then Moses went up to Mt Sinai and saw the burning bush and talked to God who told him to go to Egypt and help his people. So Moses went to Egypt and parted the red sea to help them get out of there. They were in the wilderness for 40 years. They didn't want to obey Moses and made calves to worship like the Egyptians. Stephen then calls all of the people holding him a lot of names.
As I said, that was a long meandering story as far as I can tell. There might have been more to it, but he basically seemed to just be telling the story of Moses and then called the people holding him captive names at the end. Given that he gets stoned in the next section, it seems like he is just pushing them to it.
The Stoning of Stephen
They were pissed at him, so they threw him out of town and stoned him. Stephen looked up at heaven and saw God and Jesus and told them to receive his spirit.
Basically looks like suicide by cop to me.