This is the sole story in which Isaac is the main character and where he shines.  He and Rebekah had to go to Gerar because of a famine.  God warned him not to go to Egypt (as Abraham and Sarah had done).  God also reiterated the promises to the family.  Isaac passed off his wife as his sister.  Because of her beauty, he felt threatened.  Eventually, the king of the city realized that Isaac had lied.  Though the king made sure no one would bother Rebekah, he ordered the whole family to leave.  Isaac did, but did not go far.  While in the nearby valley, he farmed, quite successfully.  This increased his wealth and numbers, which worried the Philistines.  Also, Isaac redug several wells that Abraham had dug but the Philistines had filled with soil.  Eventually, the Philistines and Isaac’s family made a non-aggression pact and lived peacefully.