Desmond Delancey is a troubled actor who finally snaps one day and begins believing he really is a knight. He ventures forth in his misguided, bumbling way to right wrongs and restore chivalry. But trouble brews when his beloved "fair maiden" turns out to be a murderer...with plans of her own for the knight-errant. Tucked unobtrusively inside the book are dozens of hidden references to BBC's SHERLOCK, one of the inspirations behind WHEN KNIGHT FALLS.