In the year 2025, Earth is depicted as a sun-scorched, post-apocalyptic wasteland known as the "Forbidden Zone," resulting from a global nuclear conflict roughly forty years prior. The survivors live in a state of primitive scavenging, dominated by localized warlords like Zaar, who utilize armored vehicles and small-arms remnants to maintain control over the irradiated dunes. The film posits that society has completely collapsed, with no central government or infrastructure remaining; however, it diverges into the mystical by suggesting that ancient religious relics, specifically the Spear of Destiny, possess the power to manipulate time and reality to avert this timeline.

The film suggests a world where the primary technological achievement in 2025 is time-travel capabilities tied to spiritual artifacts rather than digital or silicon-based advancement. While the 1986 setting of the film features contemporary infrastructure, it introduces the threat of a subterranean Neo-Nazi Fourth Reich operating in the shadows of the late 20th century. These antagonists seek to weaponize the spear to ensure the future apocalypse occurs on their terms, establishing a dynamic where the "future" is a fixed point of destruction that must be actively unwritten by heroes in the past. This interpretation of the future is distinctly Earth-centered, seeing the planet as a singular, fragile cradle that cannot survive the nuclear era without supernatural intervention.

Comparing the film's 2025 to reality, the prediction of a total nuclear collapse by the mid-2020s has, fortunately, remained in the realm of fiction. The film's vision of the future is heavily influenced by the Mad Max aesthetic prevalent in 1980s B-cinema, focusing on resource scarcity and social regression rather than the digital connectivity or climate challenges actually facing the current year. While its depiction of autonomous tribal societies in remote areas (such as the Amazonian warriors and the dwarf tribe in the Philippines) mirrors certain "lost world" tropes, these elements serve more as genre-mashup set pieces than serious sociological predictions. Analysis suggests the film is less about predicting the future and more about the Cold War existential dread of the 1980s, using 2025 as a cautionary endpoint for then-current political tensions.