Marie's world is turned upside down when her beloved dog, Max, mysteriously vanishes. Determined to bring him home, Marie transforms into a detective, setting up her bedroom as her command center and scouring the neighborhood with her friend, Sarah, by her side. Together, they piece together clues, interview quirky neighbors, and follow leads that keep hope alive. As the trail grows colder, and her heart sinks deeper into despair, a retired detective offers his wisdom, rekindling Marie's determination. With the help of new friends and renewed focus, the team uncovers a series of surprising clues. "Marie’s adventure is one of perseverance, friendship, and the deep love between a girl and her dog. Through moments of fear and joy, she learns invaluable lessons about responsibility and the power of community."