警騎在萬聖節調查一宗靈媒兇殺案，曾有不風光歷史的死者顯然是被靈體活生生嚇死的。另外，高奴和亞當被疑似死亡邪教徒綁架。
On Halloween, Five-0 investigates the murder of a medium with a checkered past who was apparently scared to death by a poltergeist. Also, Kono and Adam are kidnapped by what appears to be a death cult.
