1957年某晚,居住在美国加州莫哈维沙漠小镇中的天文学家泰德•刘易斯博士(艾瑞克•麦柯马克 Eric McGormack 饰)正为爱妻拉娜(乔蒂•汤普森 Jody Thompson 饰)准备结婚周年纪念的烧烤晚餐,突然发现一颗流星从天而降坠毁在不远处的小山坡上。同样目睹流星飞过的还有小镇餐馆女服务员泰米(詹妮•拜尔德 Jenni Baird 饰)。泰德前去查看,发现“流星”竟是一艘外星飞碟,自己也被外星人“厄普”俯身。厄普在泰米的帮助下全力搜寻逃匿的独眼外星怪兽“格塔”,却依然赶不上“格塔”吃人的速度。更可怕的是,一旦“格塔”开始以几何级数速度分身,将陷整个地球于不可挽回的危险之中。The story begins in 1957 in the star-filled skies above California's Mojave Desert. It is a special night for noted astronomer Ted Lewis, who is preparing a special dinner for his beautiful, adoring wife Lana to celebrate their wedding anniversary. In another part of town, Tammy, a waitress at small local diner with big plans for the future, looks out her window and is excited to see a shooting star, which she takes as a good sign for her dreams. But, what Dr. Lewis and Tammy assume is a shooting star, is really an alien spaceship. The fiery ball hurtles toward earth and crash-lands on a butte in the desert. The only witnesses are teens Dick and Penny who are necking in a nearby lover's lane. A tall, metallic alien named Urp emerges from the craft unharmed, alarmed to discover that the monstrous Ghota, who was also on board, has escaped. The menacing one-eyed creature's unquenchable appetite could mean the end of civilization as we know it. Urp is the only one who knows how to stop the hideous extra-terrestrial, but to do so he has to take over the body of Dr. Lewis and enlist the aid of Tammy, the only human in town willing to believe and trust in his mission. The local police - including Chief Dawson and Officer Vern - are confirmed skeptics and offer little help. Together, Urp and Tammy must hunt down the Ghota and neutralize it before it consumes all the local inhabitants and uses the human fuel to multiply and conquer the world!