After being abruptly handed a pink slip, Professor Ana Kimble finds herself at loose ends. So when Rachel Maza, a friend and former student, offers her a vacation at a secluded island resort, Ana jumps at the chance to escape to paradise. Only, Rachel has secrets she isn't sharing -- the kind that can kill. Then Rachel disappears. Suddenly Ana finds herself in the middle of a tropical nightmare. And when she uncovers a deadly conspiracy bent on stealing people's sanity, she is forced to trust Nick Travis, a dark and dangerous man with an agenda of his own. Soon the seductive heat of an island paradise makes it easy for Ana to lose her heart. And just as easy to lose her life.