Talk about Saul's rise to power and his relationsip with David.
Saul's rise to power was Samuel's answer to the cry of the people for a king. Saul was anointed king by Samuel, even though Saul was from the smallest clan of the smallest tribe (Benjamin). When Saul followed God's instructions, all went well. But when Saul went his own way, Samuel was immediately dispatched to find a new one—David. Initially this worked (see David & Goliath). There was a many-layered relationship between David and Jonathan (Saul's son), much more than The Story speaks about. Nevertheless, that belongs to the lower story, not the upper. Eventually this turned into a huge game of cat and mouse that lasted seven years, climaxing with the story of David cutting a piece of Saul's robe. It is remarkable to me that The Story doesn't make a bigger deal out of the line, "You are more righteous than I am." This is one of the few stories (Ruth being another) where righteousness is defined by a story.
To summarize, initially Saul loved David, but as the people of Israel praised David more than Saul, Saul grew jealous of David. This eventually meant David fleeing the royal palace and the seven years David was on the run. Saul committing suicide on the field of battle ended David's exile.