Chain Letter (2010)

Six friends become entangled in a deadly game when they receive a cryptic chain letter through text and email. The sinister message comes from a deranged killer targeting those who dare ignore his demands to forward the letter. What starts as a seemingly harmless threat soon turns into a life-or-death struggle, as the friends realize the letter uses their beloved technology against them. As paranoia grows, loyalty is tested, forcing them into a race against time. Break the chain and risk everything; pass it on and question loyalty—how far will friendship go?