The Taylor's family dog, Max, is kidnapped by the evil Sirus Caldwell, (Zack Ward) CEO of mega corporation Envigormax, to be used as a test subject for a new super energy drink. When trials go terribly wrong, Max escapes only to be transformed from his lovable self into... ''Monster Mutt''! The Taylor kids, Ashley (Rhiannon Leigh Wryn) & Zach (Billy Unger) try to save their loyal friend with the help of the scientist, Dr. Victor Lloyd (Brian Stepanek), who regretfully helped transform Max. The children must elude the evil Sirus and his henchwoman Natalya (Juliet Landau), who are determined to capture Monster Mutt to complete their experiment! Monster Mutt, is an adventure in both comedy & chaos as the Taylor kids race to find a cure for their furry loved one before it's too late!
在医院工作的山际辰雄（染谷将太 饰）和悦子（夏帆 饰）是一对恩爱的小夫妻。近一段时间，辰雄时常望着窗外发愣，令妻子分外不安。与此同时，悦子所在的工厂同事浅川美雪（岸井雪乃 饰）出现异样，她声称总在家中看到男性幽灵，但那却是她在世的亲生父亲。悦子将美雪送到丈夫的医院检查，结果发现美雪完全丧失了“家人”的概念。在医院时，悦子还遇到了辰雄的好友真壁医生（东出昌大 饰），而对方给她留下了十分不好的感受。渐渐她发现，辰雄与真壁之间似乎有着某种联系，两人更秘密在进行着什么。 周围的世界变得越来越古怪，悦子最终发现了一个攸关人类的可怕阴谋。
