Ensemble cast of off-the-wall Warner Brothers characters, appearing in a wide variety of roles. Wakko, Yakko, and Dot Warner, are WB Studio creations who were just too "zany" to be of any use to the studio. Pinky and the Brain are two mice bent on world domination. Rita and Runt are a cat and dog team, who get into perilous situations every episode, put always seem to find time...
三名宇航员在太空中接触了一个奇异的漂浮物体。物体在飞船内释放出巨大的能量脉冲, 两名宇航员当场毙命。而在地球上,这一脉冲给散落在全球各个角落的一小部分人带来了意想不到的变化。
教师Judith(Rebecca Spence饰)的生活本已陷入泥沼——她感到难以名状的不安,而且一直未能怀上孩子——而在脉冲给她带来一次癫痫发作后,诡异的症状开始出现:她的皮肤开始剥落,额上长出了犄角。还有一小撮人和Judith一样,对脉冲有奇特的反应。她发现自己竟是一个外星种族的后代,这一种族在地球上伪装得极其成功,以至他们竟忘记了自己的祖先。
但是现在,他们的外星本性被唤醒了。到底哪个世界才是他们真正的家园?