Narrated by Tony Award-winning actor Liev Schreiber and with an original score by longtime musical collaborators Richard Evans, David Rhodes and Peter Gabriel, this film takes audiences on a remarkable journey into the relatively unexplored world of the "other dinosaurs" - those reptiles that lived beneath the water. The film follows a family of Dolichorhynchops, also known informally as "Dollies", as they traverse ancient waters populated with saber-toothed fish, prehistoric sharks and giant squid.