Olivia Jones loves to solve mysteries with her best friend Dax and his dog, Cricket. One day, the trio go on an adventure in the woods. But on this adventure, Cricket eats something he shouldn't and gets sick. Olivia and Dax take him to the vet, but the vet doesn't know what's wrong. Can Olivia and Dax figure out what's wrong with Cricket so the vet can help him get better?