一副二手耳机，将一对死对头与亡者的世界连接在了一起。
当他们共同的女团/男团偶像好友在离奇的变故中猝然离世，一场被迫“假装情侣”的针锋相对，演变成了再也无法否认的宿命羁绊……他们不得不联手追查凶手，却不知自己早已沦为杀手的下一个目标。
真相挖掘得越深，他们离死亡——以及彼此——就越近……直到他们分不清，究竟是“亡者的呐喊”更加震耳欲聋，还是“彼此狂乱的心跳”更为清晰。
A second-hand pair of earphones connects two rivals to the world of the dead.
When their idol friend dies under mysterious circumstance s, what starts as enemies forced to "fake date," turns into an undeniable bond…as they become reluctant partners in a murder investigation, before the killer silences them as the next victims.
The deeper they dig, the closer they get to death—and to each other…until they can no longer tell which is louder: the "voice of the dead," or the "sound of their racing hearts."