On the eve of their trip to Africa, Laura Maldonada Clapper and her husband, Desmond, sit in a New York City hotel room, drinking scotch-and-sodas and awaiting the arrival of three friends: Clara Hansen, Laura's timid, brow-beaten daughter from a previous marriage; Carlos, Laura's flamboyant and charming brother; and Peter Rice, a melancholy editor whom Laura hasn't seen for over a year. But what begins as a bon voyage party soon parlays into a bitter,...