When Nina and her high school friends receive eerie text messages declaring that they will all die within three days, they dismiss it as a hokey prank - until one by one, the pals start turning up dead in the alpine countryside. With the cops stymied, Nina and her remaining friends must scour their past for clues to identify the madman before he kills them all.

One year ago, Nina survived the attacks of a serial killer. She wants to flee from these memories but one call at night recalls all memories and she is again in the middle of a murder mystery.