The last time Amelia Grace and her best friend, Kat, saw their college buds in the band Royal Flush, the guys had just launched a super-successful rock n’ roll career. Five years later, Ame's world- famous musician pals are back for a tour stop at Castle Rock. But things get heated during a fan meet-and-greet, leading to discord among the band members.

And when Royal Flush’s bass guitarist, Sid Malone, is found dead, Ame’s ex-boyfriend, Mickey, finds himself with an all-access pass to a prison cell. Between juggling her duties at Castle Rock and assuring her FBI agent beau, Emmett, that her former romance with Mickey was a one-hit wonder, Ame is on the case to prove her ex’s innocence and expose a web of lies that goes deeper than the tracks on a rock album's B-side.