Everyone in the world uses smartphone apps. But inside them lurks unknown creatures called "Appli Monsters," or "Appmon." The Appmon are AI lifeforms with the ability to think and act, and exist in the boundary between the human world and digital space. In the vast sea of the internet, the "last boss AI" Leviathan takes control of the Appmon with a virus and begins hacking every system, thus starting to control the human world from the world of the net. Haru Shinkai is led to acquire the Appli Drive, and uses it to materialize Gatchmon, a search app monster.

A virtual world was created by the present-day network called the "Digital World". The "Digital Monster", which is a digital life object, was born, and the host computer "Yggdrasil" managedthe different Digital World areas. However, it developed the "X-Program" of fear to eliminate all Digimon in the old world and develop a new Digital World for only certain Digimon... Now, the greatest crisis ever approaches the Digital World!

One day, a Digimon Xros Loader appears before Taiki, an exceptionally warmhearted seventh grader, along with Shoutmon's voice, asking for his help. The D Xros Loader is an essential item that is capable of transferring power to Digimon by means of "DigiXros". He was chosen as a "General" to control it. Taiki and his friends are thrown into a parallel universe, the Digital World. Due to the appearance of rival and enemy Digimon, the Digital World has been driven into a state of "Xros Wars", a large-scale war with battles like those of the Sengoku period. Taiki and Shoutmon form a Digimon Army using the D Xros Loader and battle against formidable opponents with "DigiXros".

The Digital World is in a state of war, with the evil Bagra Army attempting to collect fragments of the Code Crown. Whoever manages to collect all 108 fragments will become king of the Digital World. An evil group of Digimon, known as the Bagra Army, are determined to get their hands on the Code Crown. Digimon Xros Wars features Taiki Kudou, a soccer-loving middle schooler who will always go out of his way to help people in need. When out with his friends Akari Hinomoto and Zenjirou Tsurugi one day, he hears a voice calling out for help. Investigating the situation, he meets a Digimon named Shoutmon who has been severely wounded in a nearby alley. Using the power of a strange device called a Xros Loader, Taiki manages to save Shoutmon's life, but is pulled into the Digital World alongside Akari and Zenjirou. Determined not to let the evil Bagra have their way, Taiki and his friends join with Shoutmon and other local Digimon to form their own army known as Xros Heart. Now Xros Heart must fight their way across the Digital World to collect Code Crown fragments and defeat the Bagra Army, but Taiki and his friends are not the only humans caught up in this war of monsters…

Returning to the Digital World, Taiki and Shoutmon learn that the Bagra Army has taken it over and reformatted the world to have Seven Kingdoms, each ruled by a general.

Akemi Nakajima, is a high school student with a genius talent for computer programming. One day, Yumiko Shirasagi is transferred to the same class as him. She feels she knows Nakajima from somewhere, but doesn't try to deal with it. After school, Nakajima and a couple of classmates held a ceremony to summon the devil. Nakajima summons the devil Loki on the computer display while presenting a female offering. What will happen to Yumiko, who witnessed the scene?

A series of short animations that show different worlds and different characters. These episodes are designed to take the viewer into a psychological world of fantasy and mystery.

The high school boys transferred to an anime world while they are in cramming school. Since then, they start school life in the anime world they transferred in.

In the year 2072, the world's energy problems seem solved by a network of cross-dimensional electric-field inductors—"coils"—that extract energy from a seemingly infinite source. That source is the W dimension, a fourth plane that exists beyond the X, Y, and Z dimensions. In this world, unofficial "illegal" coils harness powers that the police can't hope to counter. Dealing with these coils is the job of coil-hating repo man Kyoma, whose run-in with the unique coil android Mira leads the two to form a reluctant partnership.

In the not-so-distant future, humans have done the impossible and found a seemingly infinite source of energy. By tapping into the newly discovered fourth plane, Dimension W, they are able to harness that energy using "coils." By 2071, manufacture of coils have come to be monopolized by the New Tesla energy company, which led to the appearance of unofficial, non-Tesla coils manufactured by private companies. Collectors are hired to confiscate these illegal coils for a bounty. Kyouma is one such Collector. He dislikes all coils to the degree where he doesn't even use them in his daily life. On one coil-collecting mission, he bumps into a robot girl powered entirely by coils, and they enter into a hesitant partnership in order to achieve their goals.

An unaired episode released with the sixth BD volume.

Short specials included in the Blu-ray releases of Dimension W.