Da-kyung, a horror YouTuber desperate for views, uploads a video about the eerie urban legends surrounding Gwanglim Station—the site of the highest number of missing person cases in the country….

Mantis, an ace assassin, returns to the contract killer industry after a hiatus, encountering his trainee friend Jae-yi and a retired legendary killer Dok-go, who now runs the organization.

As a grisly virus rampages a city, a lone man stays locked inside his apartment, digitally cut off from seeking help and desperate to find a way out.