A terrible electric storm rakes Kong Island activating the Primal Stones and creating a vortex that sends the seaplane with our heroes onto an island in a different time and space. In the island's dense forests, ferocious Vikings attack them! After a brutal fight, Kong is lured into a deep pit. Jason, Tann, and Lua are captured and taken to the Viking village. Kong encounters an Ice Giant in the underground caverns. The two titans battle, then make friends. Jason challenges the Viking Chieftain, Harold, to hand-to-hand combat and defeats him. However, the Viking Priest/wizard drugs our heroes and takes them to a high cliff to sacrifice them to the Gods. Kong arrives with his new friend and saves them. After a sad goodbye, Jason and the gang fly back through the vortex and return to Kong Island.