In the Kalahari Desert, an educational safari goes wrong and five teens are stranded without a guide. Sarah, the daughter of zoologists, draws on her survival skills to keep the group alive. However, when a silver lion attacks the group, the group learns the lion's silver color comes from a contagious and deadly virus that could destroy life on Earth. Now the teens must outrun the virus and its creators who want to eliminate anyone who knows about it.

Companion book to: Origin and Vitro.