Sixth and final Digimon Adventure tri film.

The inhabitants of the village of Biaz, forced to labor in the serivce of the world-domination-happy Zein organization, hires Lina Inverse and Naga The Serpent to drive off the invaders. Lina and Naga agree, lured by stories of Elfin treasure sleeping below Biaz, only to get considerably more trouble -from the Zein and from the treasure - than they ever expected. 

(Source: ANN)

Lina and Gourry travel to a seaside town named Acassi, where octopus tentacle is a delicacy. However, the octopus meat carries a curse that dooms the eater to only speak Takogo (octopus language). Amelia, Zelgadiss, and Xelloss all show up, and the main four characters (Lina, Gourry, Ameria, Zelgadiss) get cursed. The octopi enlist the power of a mazoku to get rid of the humans once and for all. The white sorceress Ruma must learn the cure to the curse from her long-lost master in order to save the town. 

(Source: ANN)

The Chosen Children have been reunited with their Digimon partners, who no longer remember them due to the effects of a digital reset. While everyone tries to reconnect with their digital monsters, Sora Takenouchi encounters resistance from Piyomon, who stubbornly refuses to speak to her. Suddenly, an attack by a hostile Digimon separates the group, scattering them and their Digimon across the Digital World.

Back in the human world, Daigo Nishijima of the Incorporated Administrative Agency receives a warning that a new entity is in pursuit of "Libra," which he believes to be an alias for Meicoomon. For some reason, Meicoomon retains all of her memories and therefore still recalls her partner Meiko Mochizuki, who has come alone to the Digital World to find her. If they hope to identify what other forces have been driving the incidents thus far, the Chosen Children must survive the obstacles of the recreated Digital World and make their way back home.

[Written by MAL Rewrite]