1) Samuel anoints David as the future king of Israel even though Saul is still king. David proves himself against Goliath and plays music to ease Saul's mood, but Saul grows jealous of David's popularity.
2) David flees from Saul's attempts to kill him and takes refuge among loyal followers. When given a chance to kill Saul, David spares him to show that he means no harm.
3) After Saul's death, David becomes king and establishes Jerusalem as his capital. However, he commits adultery and arranges the death of Bathsheba's husband to cover it up. After repenting, David's family is plagued with conflict among his sons.