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 waterphobic 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.
拉里·戈普尼克（迈克尔·斯图巴 Michael Stuhlbarg 饰）是美国明尼苏达州双城区某大学的物理教授，学校正决定是否颁发给他终身教授资格时，一位韩国学生向拉里抱怨考试评分不公，遭拒绝后则向拉里行贿。与此同时，拉里的妻子朱迪斯（莎瑞·莱尼克 Sari Lennick 饰）说她爱上了鳏夫塞·艾伯曼（弗雷德·迈拉麦德 Fred Melamed 饰），要求离婚。不仅如此，拉里的无业神经质哥哥亚瑟（理查德·坎德 Richard Kind 饰）越来越成为负担，儿子的犹太成人礼在即，女儿偷钱准备为鼻子做整容手
赞佩里尼（杰克·奥康奈尔 Jack O'Connell 饰）是一位长跑运动员，他热爱这项运动，并且有幸参加了1936年的柏林奥运会。1939年，第二次世界大战爆发，踌躇满志的赞佩里尼加入军队，为祖国报效，他成为了一名空军投弹手。 一次任务中，一场意外让赞佩里尼所驾驶的战斗机于海上坠毁，他和战友们在一艘小小的救生筏上度过了艰苦而又
