A decidedly odd couple with ulterior motives convince Dr. Alan Grant to go to Isla Sorna resulting in an unexpected landing. After their plane crash-lands, it's revealed that the Kirbys are actually seeking their teenage son, lost on the island after a paragliding accident. Trapped on Isla Sorna, Grant and his companions discover some painful truths the hard way. Among their discoveries: some of the scaly monsters possess more advanced communicative abilities than previously believed, the dreaded Tyrannosaurus Rex has a larger and more lethal competitor, and flying Pteranodons pose an even graver threat than some of their land-locked brethren.