For seven high school students from California, a routine geology field trip becomes an adventure that spans time. Splitting off from the rest of the group, the seven students discover a cave opening and decide to explore. There's no turning back as Rick, Erica, Dianna, Mike, Dan, Joe, and Ronda find themselves in the strange surrounding of another world. This begins a journey that tests the special skills and talents of each person in the group.

The teens find they are in the land of the Ge'mell, a group of people living in a fragile world torn between technological advancement and utter destruction. The Ge'mell are true artisans of time travel, but even they need help, and the open-minded students from Earth come to the rescue. With their creative thinking, bravery, and diplomatic approach, not only do the teens help the Ge'mell, but they save Earth at the same time.

Blending science fiction and fantasy, this trilogy-Rings of the Gods; Time, Friend, and Foe; and Genetic Code-captivates with its characters, its battles, and its adventure. This epic tale tests the realities of time.