As the murder of fifteen-year-old Faith Morgan brings her family to their knees, old secrets and resentments stir. Pushing his own marriage to the brink, head of the local joint law enforcement center Lieutenant Hunter Leighton vows a very personal vengeance once he catches the people responsible, while the marriage of Grace and Cash Morgan becomes an unexpected refuge in the wake of their daughter's death.

The small town of Mosaic, Georgia, happy to pass its sleepy days under porch fans with lemonade and gossip, knows little more than the occasional burglary or inebriated driver, all of whom Hunter arrests and most of whom Cash defends. As the only witness to Faith's murder, Mosaic holds everyone's secrets and decides when and how to reveal them, teaching the lesson that sometimes justice is a clear conscience. The Belief in Things Unseen spins a kaleidoscope of pages defining and redefining what it means love, hate, and be family and doesn't stop until the final page.