In November 1928, one year after Lindbergh crossed the Atlantic, a pair of young newlyweds set out to run the rapids of the Grand Canyon in a homemade boat. Swept up by America's obsession with feats of daring, Glen and Bessie Hyde hoped to set a record - she would be the first woman to run that treacherous stretch of the Colorado River. A month later they vanished without a trace. Based on the few known facts of Bessie and Glen Hyde's story and braiding the account of the young lovers' journey with Glen's father's desperate efforts to find them, Lisa Michaels creates a tale of suspense: a meditation on the line between risk and recklessness, and the passions that drive us to them.