When Spark --- the rakish prodigal son --- returns unannounced to the dilapidated family home, his arrival launches an unforgettable summer on Monhegan Island. During his absence, his gentle brother and shrewd, fork-tongued father, Pastor Ragnar, have been caring for Spark’s son, Hally. A temperamental adolescent emboldened by tales of his father’s mischief, Hally is careening through an identity crisis when he stuns his family by claiming to have had a spiritual vision. Though Spark is permanently dubious, Pastor Ragnar pounces on the chance to revitalize his flagging church. Hally is shoved into the spotlight, and in the frenzy that follows, this fragile family is pushed to the brink.

It’s 1972, and Riddle James Camperdown’s father is running for office from the family compound in Wellfleet, Massachusetts. Between Camp’s desire to toughen her up and his wife Greer’s demand for glamour, Riddle has her hands full juggling her eccentric parents. When she accidentally witnesses a crime close to home, her confusion and fear keep her silent. As the summer unfolds, the consequences of her silence multiply.