An intimate and brave first-person exploration of family, faith, and coexistence, Flood opens with filmmaker Katy Scoggin starting a new project about evolution and geologic time–third-rail topics in the Christian faith of her upbringing. Since estranged from her young-earth creationist father, who refutes the theory of evolution, Scoggin heads home to San Bernardino, CA, in an attempt to bridge their divide. She discovers a man moored to his core beliefs, yet beset by personal changes, such as retirement and a cross-country relocation with family members–including a progressive Christian wife, left-leaning younger daughter, and budding musician grandson–from whom he’s growing increasingly isolated. In this deftly layered debut, Scoggin interpolates family archives with archeological findings on paleo expeditions with scientists, making room for a variety of distinct and evolving viewpoints, interpersonal rifts and bonds, all infused with the filmmaker’s thoroughgoing warmth and generosity.