In the first decades of the 21st century, the world is convulsing, its governments mired in gridlock while a patient but unrelenting ecological crisis looms. America is in upheaval, battered by violent weather and extreme politics. In California in 2013, Tony Pietrus, a scientist studying deposits of undersea methane, receives a death threat. His fate will become bound to a stunning cast of characters—a broken drug addict, a star advertising strategist,...