Country singer Willie Nelson, who portrays himself, becomes the prime suspect when his manager is murdered, but the only witness is a blind woman who claims to have overheard a scuffle and can identify Willie as the murderer by his voice. At first Stottlemeyer (who is on the case despite a broken arm) is reluctant to arrest the famous singer on such shaky evidence, but a video tape convinces him that Willie must indeed be guilty. But for Monk, the fact that a note used to lure the victim to his death refers to him as ""J. Cross"" while Willie refers to him as ""Sonny"" casts doubt on the blind womans story. Determined for the sake of his dead wife, Trudy, a devoted fan, to prove the singer innocent, Monk interviews the blind woman and investigates the managers less than reputable background, searching for the clue he needs to clear the singers name.