From the author of "The Messengers" and "5 Rules for Life" comes a story about possession, devotion, and the harrowing parts of parenting. Deb and Michael, parents of adult daughter Mercy, invite church leaders into their home after Mercy begins exhibiting symptoms of possession. What follows is an encounter wrapped in religious trauma as Deb comes to the realization that her parenting path is different than what she expected it would be.