The dangers of social media are extolled in the first scary trailer for Unfriended, which hits theaters this spring from Blumhouse and Universal. The tale unfolds after a teen suicide is the result of a shaming video that goes viral. Universal bought the low budget thriller after watching a test audience become terrified by the horror experience.

While video chatting one night, six high school friends receive a Skype message from a classmate who killed herself exactly one year ago. At first they think it's a prank, but when the girl starts revealing the friends' darkest secrets, they realize they are dealing with something out of this world, something that wants them dead. Told entirely from a young girl's computer desktop, Unfriended redefines 'found footage' for a new generation of teens.

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The idea for Unfriended was developed and conceived by filmmaker Timur Bekmambetov (Wanted, Abraham Lincoln: Vampire Hunter), and is directed by Levan Gabriadze. Watch as a vicious bully shamed into killing herself returns for revenge, in theaters this April: