Aveline’s voice hissed from a nearby broadcast: “The symphony isn’t music. It’s a . The Halvorsen bloodline’s curse binds the spirit of Julian to these cliffs. Each performance weakens the seal. Without six lives… he breaks free.” The Final Note Elara raced back, interrupting Aveline mid-performance. With the last of her strength, she pulled the conductor’s baton from the podium and smashed the violin on the stage. A shriek echoed, the lighthouse exploding in a burst of green light. Aveline fell dead, her final chord a dissonant wail.

The user's example response has elements of a detective, a murder in a mansion, coded messages, a twist ending. I should follow that structure but ensure it's original. Let me brainstorm a unique plot. Maybe a detective with a hidden secret, a high-profile crime, red herrings, a twist.

Avoid clichés if possible. Maybe the detective's own past comes into play. Victims have connections to the detective's history. Final revelation that challenges the detective personally. Make sure the crime is clever, with clues that make sense in hindsight.