Children's animation about the unique friendship between Lottie, a girl who doesn't fit in, and Nine, a cat who doesn't fit together properly. Odd, multiple quantities of objects have been vanishing after dark, and large footprints found at the crime scenes. Rather than finishing her maths homework, Lottie enlists Nine's help to get to the bottom of the monster mystery. They identify some big-footed suspects, but like Lottie's homework, nothing adds up - until the Big Foot Burglar is revealed.