A marine biologist, an insurance salesman and a teenage boy find their lives changed when a new and often dangerous sea life species emerges, while the government tries to keep the affair under wraps.

Throughout his life Edward Bloom has always been a man of big appetites, enormous passions and tall tales. In his later years, he remains a huge mystery to his son, William. Now, to get to know the real man, Will begins piecing together a true picture of his father from flashbacks of his amazing adventures.