The rambunctious Cat in the Hat is sent on a mission to cheer up siblings Gabby and Sebastian after they move to a new town
After causing mayhem during his last assignment, the Cat in the Hat is on thin ice at the IIII (Institute for the Institution of Imagination and Inspiration, LLC). Now on a new assignment that could save his job, the Cat must inject some much-needed joy into the lives of Gabby and Sebastian, two siblings struggling after they move to a new town. Can the Cat fulfill his mission without causing too much of a ruckus?