Army of Darkness (1992)

Ash Williams (played by Bruce Campbell) is accidentally transported back in time to the Middle Ages, following the events of Evil Dead II. He finds himself in a world plagued by Deadites—undead creatures controlled by dark magic. Initially mistaken for an enemy, Ash is captured by Lord Arthur’s men and thrown into a pit filled with Deadites. However, he quickly proves his worth by defeating the creatures with his chainsaw and shotgun, earning the people’s respect.
Ash learns that the only way to return to his own time is to retrieve the Necronomicon, the Book of the Dead, which is also the key to banishing the evil that terrorizes the land. Despite being reluctant and self-centered, Ash agrees to the quest, motivated by his desire to go home.
On his journey to retrieve the Necronomicon, Ash faces numerous challenges, including evil doppelgängers, treacherous terrain, and an army of skeletal Deadites. His arrogance and carelessness lead him to accidentally unleash the “Army of Darkness” by improperly reciting the magical incantation while retrieving the book.
The climactic battle takes place at Lord Arthur’s castle, where Ash and the medieval humans band together to fend off the Army of Darkness. Using his ingenuity, modern knowledge, and a makeshift car-turned-war machine, Ash helps the castle’s defenders achieve victory.
In the end, Ash successfully returns to his own time by drinking a potion given to him by a wise man. Back in the present, he resumes his mundane job at S-Mart, only to encounter another Deadite, proving that the evil he fought still lingers.