Sara Almquist is shot at twice in one day. Albuquerque police fear her work for them as a science consultant on previous cases has put her in danger, but the accumulating evidence doesn’t make sense. Thus, when colleagues in the State Department invite Sara to arrange exchanges between scientists in the U.S. and Cuba, she jumps at the chance to get out of New Mexico and to work again with the mysterious Xave Zack. Maybe it’s not a wise decision.