Captain Lee Crane picks up a woman named Carol Denning to be escorted to the Antarctic via the Seaview, as she is to be reunited with Jason, her boyfriend who disappeared in the area several months before but suddenly reappeared. Her father and two other men who were also with him, all of which had disappeared as well. A native girl is convinced to let them out of their cage, although unfortunately another dinosaur interferes with their escape, killing Jason in the process, which allows everyone else to escape, where they are spotted by the Seaview and rescued.