The film revolves around the "Blue Whale Challenge" game used by many young people and adolescents, after the spread of technology and the parents are too busy to look after their children which might lead to their exposure to great risks.

Após a taxa de suicídios entre adolescentes disparar misteriosamente, as autoridades começam uma investigação para descobrir o que está por trás do caso, e as mortes acabam sendo ligadas a um macabro jogo de desafios na internet.