In a small Japanese seaside town, a dilapidated old cinema on the brink of closure decides to screen a marathon of war films on its last night. Among the attendees are three young men—Mario, an aspiring director; Shigeru, a film enthusiast; and Hosuke, a history buff—who find themselves mysteriously transported into the films themselves. As they traverse through various historical settings ranging from samurai conflicts to World War II battles, they witness firsthand the chaos and devastation brought about by war. Each setting presents unique challenges, forcing them not only to survive but to understand the deeper implications of violence and human suffering.

As they navigate through these cinematic realms, the trio encounters a mysterious young woman who appears in each scenario, guiding them and challenging their perceptions of heroism and morality. Their journey is filled with surreal adventures and existential musings interwoven with the theater’s projections, blurring the line between fiction and reality. The experience prompts them to reflect on humanity's inclination towards conflict and the power of cinema as a vehicle for empathy and understanding. The film grapples with profound themes of history, memory, and the arts' potential to influence real-world perceptions, as each young man grapples with his own inner conflicts amid the unfolding narrative chaos around them.