A SWAT team is only as good as its weakest link. The Listener works hard to make sure that no link breaks. She's constantly watching the team, testing to see if anyone's getting too close to the edge. But she can't do much when her help is refused. Dr. Maria Worley is the Listener. Maria's latest case is the hardest she's ever had. In her experience, no patient has walked closer to the edge than Ryan Lukas. Worse, he's convinced himself that he's just fine. And to make things even more complicated, Maria--and her teenage son--need Ryan as much as he needs them. The Listener is about to learn that helping others is easier than helping yourself. The Guardians: This time the good guys wear black