For former FBI-agent-turned-thief Blair Morgan, the world's most unbreakable vault is her most irresistible target. Blair Morgan has embraced her second career-as an elite thief. Her heist crew has set their sights on their latest target: the Sierra Diamond, an 872-carat stone worth $27.3 million. It will be encased in a new vault known as the Sky Safe, a revolutionary strong room built into the side of a Los Angeles...