1916年，第一次世界大戰在西線激烈進行，約克郡拉姆斯登的合唱協會失去了大部分男性成員，他們都應征入伍了。雄心勃勃的委員會決心繼續前行，決定招募本地的年輕男性來填補隊伍空缺。同時，他們還必須聘請一位新的合唱指揮，最有希望的人選是亨利·格思里博士（拉爾夫·費因斯 飾）——一個意志堅定、毫不妥協、剛從德國音樂生涯歸來的男人。隨著征兵通知陸續送達，全社區的人逐漸意識到，在戰爭摧毀一切的混亂中，最有力的回應就是：一起奏響音樂。

當一位作曲家的任務是完成她已故導師的協奏曲時，她很快發現演奏音樂會帶來致命的后果，這讓她發現了旋律的令人不安的起源和已經覺醒的邪惡。

　　處死朱由樺的當天，朱由樺離奇失蹤，梅兒和蘭心都因此受到責罰。蘭心不顧太子反對，執意要將朱由樺送還給三皇子，卻發現馬車上的孩子竟然不翼而飛。蘭心和太子感情出現嫌隙，梅兒和金碧瑤使出渾身解數爭得太子寵愛。太子和萬歷等人到郊外狩獵，有人暗殺太子，梅兒為太子擋下一箭，生命垂危，太子深受感動，認為欠梅兒太多。上官鴻業調查太子行刺事件，卻發現幕后的真兇并不是眾人猜想的三皇子，而是梅兒。梅兒冊封當天，鄭貴妃揭出了梅兒乃娼妓之女的秘密，讓梅兒不能受封。鄭貴妃趁勢發動自己的親信彈劾上官鴻業，蘭心救父心切，卻誤會太子，兩人再次不歡而散。失蹤多日的朱由樺突然出現在蘭心房中，將朱由樺放入籃子中帶入宮去，卻被梅兒換成了旋兒，蘭心帶“朱由樺，”進宮，巧遇為上官鴻業來求情的太子，太子再次產生了誤會。在王恭妃和鄭貴妃的逼迫下，太子提劍殺死了璇兒 ，等知道時璇兒已經沒有了呼吸。蘭心傷心欲絕。蘭心帶幸存的朱由樺離去，太子策馬追去，卻尋不見蹤影了。皇上以太子妃一位不可久缺為由，冊封大學士王中澤之女王氏為太子妃。

　　The nightmare was about a demonic possession. A long time ago, there was an evil in a small town and it was jealous of the girl and would never let her go, since the devil loved the girl. One night, the evil raped the girl and she became pregnant. After months the girl could not hide her baby, her father figured her secret out and clapped the girl in irons and locked her room door. But the evil put the gun to her father' temple and saved the girl. The father had a stroke and had been sleeping on the bed for three months and died. Time went on and the girl brought a child into the world. Naturally, people who were living in the village heard the story and they did not want to see neither the girl nor the baby since when the baby was born, plants dried in the field, fishes lost in the lake and people had prayed to the god for rain, but nothing changed in the village. People got so angry, dug a hole in front of the fountain, put her into the hole and threw stones at her face. The girl died soon after. The evil went off the deep end, took a revenge of the village and killed everyone except two sisters because the evil wanted them to take care of its baby...