Here's the blurb:
Dana, a modern black woman, is celebrating her twenty-sixth birthday with her new husband when she is snatched abruptly from her home in California and transported to the antebellum South. Rufus, the white son of a plantation owner, is drowning, and Dana has been summoned to save him. Dana is drawn back repeatedly through time to the slave quarters, and each time the stay grows longer, more arduous, and more dangerous until it is uncertain whether or not Dana's life will end, long before it has a chance to begin.
When unattended environmental and economic crises lead to social chaos, not even gated communities are safe. In a night of fire and death Lauren Olamina, a minister's young daughter, loses her family and home and ventures out into the unprotected American landscape. But what begins as a flight for survival soon leads to something much more: a startling vision of human destiny... and the birth of a new faith.
Lauren Olamina's love is divided among her young daughter, her community, and the revelation that led Lauren to found a new faith that teaches "God Is Change". But in the wake of environmental and economic chaos, the U.S. government turns a blind eye to violent bigots who consider the mere existence of a black female leader a threat. And soon Lauren must either sacrifice her child and her followers -- or forsake the religion that can transform human destiny.