Famine strikes, and Abram has to go down to Egypt to survive.
Check out the tension with the deity's promise in 12:7. Did God give Abram a bum land? It's like being sold a car that's a lemon. This is the first hint that God's promises do not always come about in a way that is easy or straightforward.
As they arrive near Egypt, Abram tells Sarai that she's such a catch that the Egyptians will try to kill him and let her live.
The best strategy is to tell them Sarai's his sister.
And guess what? Abram is right. The Egyptians think Sarai is a total babe. Even the higher-ups are telling the Pharaoh (a.k.a. the absolute ruler of Egypt) about this new supermodel in town.
Pharaoh lets her hang in his court, and Pharaoh treats Abram very well. He even gives him a bunch of cool stuff: sheep, cattle, donkeys, slaves, and camels.
Abram's loving it, but the deity has other ideas.
The Lord unleashes devastating plagues upon Pharaoh and his whole household.
A bell is ringing. It's telling you that this sounds an awful lot like the first twelve chapters of the biblical book of Exodus. Right?
Pharaoh somehow realizes that the plagues are caused by the fact that he's harboring Abram's wife in his court. But the narrator is mum about how he figured it out.
Pharaoh tells Abram to take his wife and get out of his face.
But Abram gets to keep all his stuff. So he keeps his life and wife and gets a brand new Mustang, all while there's a famine in his own land.