When an Internet celebrity was live broadcasting, the screen was suddenly flooded with countless malicious barrages. The words turned into black mist and swallowed it up, leaving only a distorted Nuo face (digital projection). The police classified it as a "sudden myocardial infarction", but Lin Yuan saw the remaining "data ghosts". He discovered that the victim had been involved in a large-scale online violence. He must dive into the huge ocean of social media data (by beating the "data source dance" in the city's server center), track the source of malicious emotions, and fight against this ghost made up of the evil of all people.