An introductory page contains a diagram of the Mesozoic Era showing the Triassic, the Jurassic, and the Cretaceous Periods. A brief text explains that living things have been around for billions of years and the place in time for the Spinosaurus. A twenty-two page story follows which personifies a male Spinosaurus and takes him through a day in his life. He awakens to discover that the river has flooded and the tides are high. He must get to higher ground to avoid drowning.