Life has no narrative; you impose your own narrative on your life.
Life is one event after another, pretty much, except that you can control the response to each event, and to the extent that one imposes a narrative on one's life, one's responses might be narrowed down according to that narrative.
But random things happen, where narratives have to be disrupted, and an entire narrative (or non-narrative) grafted onto life's experiences.
If we think our own lives is a story, then it becomes a story to ourselves, and our choices hinging upon those narratives. But, we reinvent ourselves, come up with new narratives, and so on.