A narrative is something that allows a person to stay engaged in a piece of work. A good narrative acts like a bridge that pieces all the plots together.
An example of a good narrative I have came across is a game called “Beyond: Two Souls”
“In Beyond Two Souls, gamers will play through fifteen years of Jodie’s story, experiencing the most striking moments of her life. As she traverses the globe, Jodie will face incredible challenges set against a backdrop of emotionally charged events, the likes of which have never before been seen in a video game. Like its predecessor Heavy Rain, Beyond Two Souls will allow players to shape the course of the story through their decisions and actions taken in the game.”