Saoirse Ronan and Ian McEwan reunite for tragic romance ‘On Chesil Beach’

"On Chesil Beach" is a beautifully made film that is as difficult to write about as it is to watch, and it is inescapably hard to watch.

Yet the reasons it is difficult — a completely heartbreaking story brought to exquisite life via immaculate writing, directing and acting — are why it’s worth…