What is the main conflict in The Broken Bridge by Philip Pullman?

The Broken Bridge by Philip Pullman is a mysterious coming of age tale whereby sixteen-year-old Ginny Howard launches her own personal investigation into her family's background after clues and inconsistencies arise that create more questions for her than answers. She begins her journey as an innocent and sheltered adolescent who is protected by her father from a darker side of the world. Ginny's strong personality and her growing knowledge of her rare artistic talent work to keep her grounded and secure during her quest for the shocking truths she is about to uncover in her family's history.