"Crayon Shin-chan: Densetsu o Yobu Buriburi Sanpun Pokkiri Daishingeki" is a feature-length anime film centered on the mischievous and energetic five-year-old Shinnosuke "Shin" Nohara. The story begins with Shin and his family encountering a mysterious old man who gifts them a peculiar device called the "Buriburi Watch." This device allows the user to rewind time by three minutes, but only once per day. Initially, the Nohara family uses the watch for trivial and humorous purposes, such as fixing minor mistakes or avoiding embarrassment.

The plot takes a dramatic turn when a group of criminals, led by the sinister Dr. Buriburi, seeks to exploit the watch's power for their own nefarious plans. Dr. Buriburi aims to use the watch to manipulate time on a larger scale, threatening to disrupt the natural order and cause chaos. As the stakes rise, Shin and his family, along with their friends and neighbors, must band together to thwart the criminals' schemes.

Throughout the film, Shin's characteristic antics and humor are balanced with moments of tension and action as the Nohara family navigates the challenges posed by the Buriburi Watch. The narrative explores themes of responsibility, family unity, and the consequences of tampering with time. Key characters include Shin's parents, Hiroshi and Misae, who provide both comedic relief and emotional depth, as well as Shin's friends and classmates, who contribute to the film's dynamic and engaging storyline.

The climax involves a high-stakes confrontation with Dr. Buriburi and his henchmen, culminating in a dramatic resolution that underscores the importance of using power wisely and the strength of familial bonds. The film maintains a balance of humor, adventure, and heartfelt moments, staying true to the spirit of the "Crayon Shin-chan" series while delivering a standalone story that appeals to both longtime fans and newcomers.