A tangled mercy : a novel / Joy Jordan-Lake.

Enhanced descriptions from Syndetics:

A haunting and redemptive novel inspired by the heartbreaking true events that occurred at a church in Charleston, South Carolina, A Tangled Mercy examines the horrifying depths of human brutality and our enduring hope for forgiveness.

After the sudden death of her troubled mother, struggling Harvard grad student Kate Drayton walks out on her lecture--and her entire New England life. Haunted by unanswered questions and her own uncertain future, she flees to Charleston, South Carolina, the place where her parents met, convinced it holds the key to understanding her fractured family and saving her career in academia. Kate is determined to unearth groundbreaking information on a failed 1822 slave revolt--the subject of her mother's own research.

Nearly two centuries earlier, Tom Russell, a gifted blacksmith and slave, grappled with a terrible choice: arm the uprising spearheaded by members of the fiercely independent African Methodist Episcopal Church or keep his own neck out of the noose and protect the woman he loves.

Kate's attempts to discover what drove her mother's dangerous obsession with Charleston's tumultuous history are derailed by a horrific massacre in the very same landmark church. In the unimaginable aftermath, Kate discovers a family she never knew existed as the city unites with a powerful message of hope and forgiveness for the world.