Set in modern day Helsinki, Finland, Virality portrays the lives of several main characters confronted with viral themes. The film links emerging viral aspects in our modern day societies, such as the spreading of news on the internet, with the viral nature of life itself, as in the storyline of a cancer patient being treated with virotherapy. Being primarily a crime film, the main storyline centers around a bitcoin heist that connects the lives of the main characters. Character storylines involve a young rapper searching for a breakthrough, a policeman who falls for an aspiring musician with a promising international career, a hacker choosing his own path and a cancer patient and a banker who reconcile ten years after the end of their marriage.

Eelis is skipping classes, mom and dad are on the verge of divorce, sister has yet another boyfriend. The life of a little boy is in its turning point.

Four stories about Finnish life intersect. In the first one, drum artist Monkki Mähönen arrives for a renovation job at his old band mate's summer villa. Second story revolves around wannabe motorcycle gang and its leader Jouni who are being humiliated at a village shop. Thirdly in the 1960s, a star reporter Erkki "Likasanko" Sysimetsä starts writing a once in a lifetime story about the womanizing of Arvo Hakala, a pipe organ repair man. In the fourth story, a fantasy and sci-fi film director Kurt "Kurre" von Riikonen is looking for financing of his upcoming movie Excalibur IV with catastrophic consequences.