Ava is known as the "church girl" at school, a label that brings her nothing but trouble. Her deeply religious family insists she leads a church group for teenagers, making her an easy target for bullies. The worst of them all is Harper, a rebellious teen who despises Ava's prim and proper ways. Harper's relentless mockery and teasing make Ava's school life a daily struggle. When Harper's behavior spirals out of control, her father David is at his wit's end. Desperate for a solution, he meets his old friend Christopher at church. Christopher suggests that his daughter Ava's church group might be the answer, sharing stories of how it has helped even the most troubled teens. Reluctantly, David agrees, hoping this will be the turning point for his daughter. Now, Harper has to find out what it's like to be a "church girl." Thrust into this world, she must confront her own demons and prejudices. Ava, on the other hand, faces the daunting task of guiding the person she hates the most. As they navigate this challenging journey together, they unexpectedly discover completely new sides of each other. This story is narrated by Charlotte to her children. But the truth of who she is and why she retells this story will unfold only at the end.