And as the sun dipped below the horizon, Lena and Max knew that their love would last a lifetime.
Don't separate them by a car crash or an amnesia plot (circumstance). Separate them by a disagreement over whether to have children, or where to live, or what to believe (conflict). Conflict reveals character. Circumstance just delays the plot. And as the sun dipped below the horizon,
In stories, misunderstandings drive the plot. In life, misunderstandings destroy it. or where to live