Gus brings the gang to Brianna for some rest and relaxation and they're caught in an earthquake. Harrison, separated from his jet pack, is rescued by Havave and helps him on his Kamuna initiation ceremony, while Ec'co discovers the volcano they are near will explode and destroy the local island. Harrison tries to convince Havave not to give in to peer pressure while helping him deliver an egg to a local creature as part of the rite, but they fail. He and Havene meet up with the others and the Akua, Havane's people. The Akua initially refuse to leave but Havane's actions convince them and they accept him despite his failure. The team manage to get to the Gate just in time as the island is destroyed.

The team arrives on a civilized high-tech planet, Rokari, where they determine a comet is heading for the world they're on with only 60 hours to spare. The local government, the Commonality, don't believe their warning and state they have outgrown written and recorded language. The team break out a member of an underground resistance that distributes writing and leads them to a hidden library with info on how to use the planet's defense system. Harrison manages to figure out the language and the team activates the defense system, the Commonality sees the value of writing and everything turns out well.