Mourning the passing of her mother, Sage Singer decides to attend a grief support group. She doesn't expect to start an unlikely friendship with an elderly man also attending. Josef Weber is a beloved, retired teacher and Little League coach. Together they attempt to heal.

But one day he asks Sage for a favor: to kill him. Shocked, Sage refuses but then he confesses his darkest and long-buried secret, one that irrevocably changes Sage's worldview. She suddenly finds herself facing questions she never expected, such as what do you do when evil lives next door? Can someone who's committed a truly heinous act ever atone for it with subsequent good behavior? Should you offer forgiveness to someone if you aren't the party who was wronged? And most of all, if Sage even considers his request, is it murder or justice? The Storyteller explores these issues and more in this "profound and moving novel about secrets, lies, and how the power of stories can change the course of history" (Shelf Awareness).