Their relationship is an open secret, and no one is surprised when Collis marries Arabella after his wife's death. But "The Four Hundred" -- the elite circle that includes the Astors and Vanderbilts -- have their rules. Arabella must earn her place in Society -- not just through her vast wealth, but with taste, style, and impeccable behavior. There are some who suspect the scandalous truth, and will blackmail her for it. And then there is another threat -- an unexpected, impossible romance that will test her ambition, her loyalties, and her heart . . .