When Susan is diagnosed with a fatal skin disorder, her world collapses. Wracked with despair, she sits on the ledge of a Manhattan building, waiting to jump. Police negotiator Dave, driven by his own trauma, saves her life. Pledging to help one another, Susan offers advice about Dave's marriage, which is in shambles due to Lynne's suspected infidelity. Dave helps Susan, who has always been beautiful, to understand that her life isn't over while there is hope. Dave discovers his wife is the victim of a controlling, obsessive, and insane man. Lynne, Dave, and Susan become close. But Dave and Lynne's children are abducted, and Dave must confront a man who terrorizes innocent people to further his own obsession, including murder.