ヒンズー教とキリスト教とイスラム教とを同時に信奉し、かつ円周率を延々と暗記するほど賢く、泳ぎや楽器も得意な少年パイ。インドで動物園を経営していたパイの一家は、新天地を求めて動物とともにカナダに移住を決断。しかし乗船した日本の貨物船は太平洋を北上中に海難事故に遭い、16歳の少年パイが人間では唯一の生存者となる。

The Nereus is a fifty-year-old Ice Breaker, salvaged by an idealistic crew on a mission to catch illegal fisherman. On chase, the crew find themselves well off-course and bearing down on a body mysteriously floating in the middle of the Devil’s Sea. Superstitious or not, the team soon discovers they’ve rescued a deadly creature feeding on the lifeless body. Their new mission—kill or be killed and preferably before they hit land.

Sydney Carpenter is a devoted mother to her young son, and is now accustomed to the puzzling existence of her mysterious, non-communicative husband, Matthew. When her husband and son are suddenly lost at sea after a boating accident, Sydney's comfortable existence is shattered. Although overwhelmed by her grief, Sydney cannot ignore the strange pieces from her husband's past that continue to make their way into the present.