Infected Digimon—digital monsters who have begun acting in a berserk manner and experiencing a bizarre increase in power—are invading the real world. While Maki Himekawa and Daigo Nishijima, agents of the mysterious Incorporated Administrative Agency, attempt to learn more about these disruptive appearances, most of the Chosen Children are busy preparing for Tsukishima General High School's summer festival. Mimi Tachikawa, having recently returned to Japan after living in the United States for years, struggles to find her footing among her classmates and fellow Chosen Children. Meanwhile, by throwing himself into his studies, Jou Kido has been deliberately avoiding all issues related to Digimon, causing his partner Gomamon to run away. Mimi and Jou's individual actions cause friction within the group even as the threat of infected Digimon still looms over them. Will the two resolve their personal conflicts in time to help their friends fight off the latest threat?

In the year 2020, technology is everywhere. Every digital device around the world is connected by a singular network where data travels. Unbeknownst to humans, this network has become home to life forms known as Digimon. Fifth-grader Taichi Yagami is preparing for summer camp when strange occurrences begin in Tokyo; certain electronic systems have started going haywire. When he discovers that his sister and mother are trapped on an unstoppable train, he rushes to the nearby station. Suddenly, Taichi is transported to another world where he meets a strange creature by the name of Agumon, who somehow already knows his name. Taichi also receives a strange device called a Digivice, which allows him to communicate with the undigitized world. Taichi discovers he is in the Network, and virus-like Digimon are attacking the areas that maintain Tokyo’s electronic systems. It is up to Taichi and his new partner Agumon to stop these cyberattacks before the whole world is threatened by the actions of mischievous Digimon.

As the Chosen Children and their partner Digimon live happily together in the human world, Taichi Yagami and Yamato Ishida, alongside their friends, dedicate themselves to maintaining this hard-earned peace. Though united by this innate responsibility, each one has already started to take their first steps toward a future beyond being a Chosen Child. However, this new journey is interrupted by the appearance of Menoa Bellucci, an American professor specializing in Digimon research. She bears news of several Chosen Children from around the world being found comatose, with their partner Digimon nowhere to be found. Menoa's investigations indicate that a new breed of Digimon is behind the alarming phenomenon: Eosmon, who hides within the internet's depths. To succeed in this mission, the team must endeavor through the growing distance between them and band together one last time.

A crowdfunding campaign opened for the Digimon Adventure Memorial Story Project. It was for 5 shorts that included a prequel of the upcoming film and side stories about the daily lives of the Digimon characters and their partners, which are stories that did not make it into the film. The campaign was successfully backed. (Source: ANN)