Chastised for not cooperating with the oil industry’s minion, New World Petroleum, zoologist Cassidy Lowell is reassigned from the jungles of the Niger Delta to Yellowstone National Park, where wolves are mysteriously disappearing. Special forces operative Jake Anderson, working within the shadows of Cassidy’s organization—the Zoological Ecological Biological Research Agency—is investigating the threatening connection between ZEBRA and NWP. When a lethal virus is set loose in Yellowstone, only Cassidy and Jake stand between it and the rest of the world. But to destroy the biological weapon, they must shut down New World Petroleum. With traitors, murders, and death threats standing in their way, the two of them set out on a treacherous journey back to the Niger Delta.