One night at a party, a group of friends experiment with trace phenomena - a form of EVP (Electronic voice phenomena), however, one by one the friends begin dying and soon realize a door to a horrific realm has been opened. It's a race against time and demonic forces to sever the transmission, save themselves and prevent the demon from entering our world. 一班朋友深夜開派對，嘗試通靈—一種名為「靈音現象」的超自然活動，但當友人逐個死去，大家才意識到通往恐怖領域的扇門已經打開。他們除了要跟時間競賽，更要與惡魔力量大鬥法，阻止魔鬼憑著他們的發訊，進入人類的世界。最後，誰有命留下來？
