In this atmospheric middle-grade mystery, strange happenings take over Eerie-on-Sea right before Ghastly Night. When a hypnotic stage magician arrives with a shadowy act and shocking claims about Herbie Lemon's past, townspeople begin vanishing into thin air. Herbie and his brave friend Violet Parma must brave local legends to face an ancient, shadow-devouring creature before darkness swallows the entire town.