"Sadie" follows a determined sister's gritty journey into the darkest corners of America to avenge her younger sibling's death. When Mattie is found dead, her sister Sadie's life collapses. The official investigation fizzles out, but Sadie won't let the killer escape justice. As she hunts for clues, West McCray, a radio personality captivated by her story, launches a podcast that traces her quest. The parallel narratives of Sadie's relentless search and the podcast's investigative journey twist and turn, leading to an unforgettable climax. Summers' novel is an intense and emotional voyage that examines the bonds of sisterhood and the cost of seeking truth.