Two married couples become increasingly agitated with each other as they find out things about each other's past, while one of them is receiving disturbing packages from an unknown source.

When playwright Claire is invited to set her latest work at a rural theatre company, her fiance Monica tags along for a much-needed vacation. Upon encountering Mutty, an enigmatic groundskeeper with a gross lack of social boundaries, Monica's hopes for respite, her future with Claire, and her very sanity are thrown into jeopardy.