A head in the creek. A town full of secrets. A race against time. Sixth grade was supposed to be about lunch trays, kickball, and maybe impressing the new girls at school, not finding a dead body in the creek. What begins as an ordinary walk to school becomes anything but... Tommy never expected to stumble across a head floating in the creek, or to uncover a real-life mystery involving a woman's murder, a dangerous fugitive, and a high-stakes plot at the local racetrack. But when no one else seems to connect the dots, Thrills and Chills Inc. gets back in action! With a treehouse headquarters, a love for snacks, and a whole lot of guts, Tommy, Steve, Paul, and their new allies, Karen and Kelly, dive headfirst into an investigation that could put them in the crosshairs of dangerous criminals. As clues pile up, the stakes grow higher. Will their detective work be enough to stop a mob plot before it's too late?