A thrilling fantasy takes place in a Wild West-inspired location where the Nohara household, along with their comrades Kazama-kun, Nene-chan, Masao-kun, and Bo-chan, and other Kasukabe City locals suddenly find themselves transported to the set of an unfinished cowboy movie. However, the eerie township is under the control of the wicked Governor Justice and trapped in a time warp, causing everyone to lose their memories of the past. The Kasukabe Defense Forces must unite and defeat Governor Justice, complete the movie, restore the memories of the people, and find their way back home.