This second chance, grumpy-sunshine romance of sorts, but told in a bit of a different way.
She's the grumpy. He's the sunshine. Also, he's felt something for her for a very long time. And of course, she hates him for it.
So when she moves back home with her parents, frustrated, lonely and scared she'll never be able to afford her own home after a disastrous marriage and subsequent expensive divorce, the last person she wants to see is the guy who left her on prom night.
Too bad he still lives next door to her childhood home.