Three-year-old Jonathan loves nothing more than spending Saturday mornings at his Grandma and Grandpa’s house, playing with his collection of toy cars. After a morning spent playing with Grandpa and a fun-filled afternoon ride, Jonathan returns home to a shocking discovery: his beloved cars have vanished! With the help of his quick-witted Grandma, Jonathan begins to investigate the mystery of the "Red Cat"—a sneaky creature said to take things left lying around. Jonathan and Grandma embark on a "quest" through every corner of the house to find the culprit and his treasures.