Why cling to a dying dream?

Five years before on her first trip to Scotland, young, impressionable Ellen had met and married the dashing Dermid Craig.

But Dermid and Ellen had been separated for almost three years - longer than they'd be together. Now, flying from Canada to Scotland, with their small son to confront Dermid again, Ellen tried to understand what had destroyed the passion and promise of the early years.

Why not concede that it was over? Or was this her last chance to rebuild their marriage?