The Mighty Muskrats’ new case is a real showstopper! School’s out for the four Cree cousins, but this is no ordinary summer—a movie is being filmed in Windy Lake First Nation. With superheroes in their backyard, the cousins can’t wait to show the actors and stunt doubles all that Windy Lake has to offer—as soon as they actually meet them, that is. On a film set, everyone has a job. Even the Muskrats, who are helping Mavis, owner of Windy Lake’s well-loved House-taurant, with the film’s catering. As Sam, Otter, Atim, and Chickadee take care of the cast and crew, a truck filled with specialty props and equipment disappears. Filming is halted—a disaster for everyone, including Mavis—and Windy Lake’s reputation is suddenly at stake. It’s up to the Mighty Muskrats to find the culprits and get the filmmaking back on track!