Marine scientist Fred Miller designs the world's first underwater home, but when the business magnate funding his work threatens to end the project, Miller volunteers to live in it with his own family to prove it's practical. The underwater clan includes his water-phobic wife and his daughter and son, who are part of a rock and roll band. They bring along the lead singer and drummer. Along the way, they have to contend with a competing engineer who promises to mine the ocean floor for the businessman. A record producer likes their music and books them on TV, leading the kids to try to escape to the surface.。十八年前,孟婉茹的世界轰然崩塌。她的丈夫陈国章背叛了她和三个年幼的儿子,为了另一个女人徐丽丽,决然提出离婚。面对嗷嗷待哺的孩子们,孟婉茹选择了牺牲自己的幸福,默默承受着屈辱,进入陈家做起了保姆,一心只为孩子们能有一个完整的成长环境.....。