In a quiet town in California, daily life is interrupted by a strange phenomenon: a thick green fog begins to take over the area, dragging with it echoes of terror. A group of scientists and military personnel come together to investigate this mystery, only to discover that the fog is merely the gateway to a much greater threat: slimy creatures from another world, manifesting as gelatinous beings with unfriendly intentions.
As the slime people, as they are called, start attacking the townsfolk, chaos ensues. The only hope lies in a small group of survivors who must band together to confront this unusual enemy and protect humanity from the imminent danger. As they fight to survive, the protagonists are forced to confront their own fears and forge connections with one another amid the panic.
With an atmosphere of constant tension and special effects that are a curious mix of ingenuity and nostalgia, the story unfolds in a classic science fiction setting that reflects the desires of cinema from that era. The characters' journey becomes a symbol of courage and camaraderie, demonstrating that even in the face of the unknown and terrifying, the human spirit can find a way to shine in adversity.