Before introverted word-nerd Zoe gains the courage to enter the National Scrabble Championship, she meets her emotional match in Marty, an irascible recluse. She finds him equally pitted against the opposing forces in her life – other people – including family, co-workers and a couple of particularly irksome adversaries standing in the way of her dream to become the world’s second female National Scrabble Champion.

A weekend trip to the woods for a bachelorette party turns deadly when a nearby train accident causes a chemical reaction that overtakes the secluded valley. But waiting out the disaster inside could prove to be just as dangerous as being outdoors.