A seemingly ordinary school trip to a STEM summit devolves into a race against time when a mysterious death and a dangerous contagion threaten lives and ancient secrets. Haley Quinn, a prodigious eighth-grader, finds herself entangled in an investigation when a cow dies under peculiar circumstances near the Mississippi River. Her objective is to uncover the truth behind a rapidly spreading disease and the secrets buried within Ammon's Bluff, a historical Native American site. She must contend with a menacing figure with unknown motives, a deadly pathogen, and the cryptic legacy of the ancient Mound Builders before the contagion claims more victims, including young Pete.

The premise sets up a fast-paced adventure blending scientific mystery with historical intrigue, likely appealing to young readers who enjoy problem-solving narratives. The inclusion of a gifted young protagonist suggests a focus on intelligence and deduction as key plot drivers. The narrative appears to center on uncovering ancient secrets tied to a contemporary threat, promising a blend of past and present challenges. The story's structure likely involves Haley piecing together clues from both scientific data and historical lore to resolve the central crisis.