"Gekijōban Date A Live: Mayuri Judgment" is a film adaptation within the "Date A Live" franchise, expanding on the original series' narrative. The story centers on Shido Itsuka, a high school student tasked with sealing the powers of Spirits—mysterious beings whose appearances cause catastrophic spatial quakes. Shido achieves this by forming emotional bonds with the Spirits, a process that often involves romantic interactions.

The film introduces Mayuri, a new Spirit who appears in Shido's world. Unlike previous Spirits, Mayuri exhibits a childlike innocence and a lack of awareness about her origins or purpose. Her arrival coincides with a series of anomalies, including the disappearance of Spirits and distortions in reality. Shido, along with his companions from the organization Ratatoskr, investigates these phenomena, uncovering a connection to Mayuri's existence.

As the story progresses, it is revealed that Mayuri is a manifestation of a program designed to reset the world, erasing all Spirits and their associated memories. This revelation creates a moral dilemma for Shido, who must decide whether to allow the reset to preserve the world or find a way to save Mayuri and the Spirits he has bonded with. The narrative explores themes of sacrifice, memory, and the consequences of altering reality.

Key characters include Shido Itsuka, whose determination to save both the world and the Spirits drives the plot; Mayuri, whose enigmatic nature and tragic backstory add emotional depth; and the recurring Spirits such as Tohka, Origami, and Kurumi, who play pivotal roles in the conflict. The film maintains the franchise's blend of action, romance, and science fiction, while delving deeper into the ethical implications of Shido's mission. The resolution hinges on Shido's ability to reconcile his desire to protect Mayuri with the broader consequences of her existence, culminating in a climactic confrontation that tests his resolve and relationships.