This is Roberts' 3rd book in her Calhoun Women series. Everyone is searching for the mysteriously hidden famous emerald necklace--including two criminals. Professor Quartermain is naively brought in by the criminals and stashed on their yacht to review stolen papers, in hopes he'll find a lead to the necklace. Instead, he discovers what's going on, jumps ship, is saved by the lovely Lilah Calhoun and falls in love. Will it be mutual? Will the emeralds be found?