After seeing her friend’s disturbing social media posts, Riko tries to intervene to help her but fails to prevent her from dying a mysterious, violent death. Convinced there is more to the story than a suicide, Riko dives into a world of memes, influencers, and posting for attention. As the pile of bodies grows, and Riko faces her own possible curse, she and her friends travel to Taiwan to find the source of this demonic social media killer.

Shinsuke Kujo is a chair craftsman who lures people into his apartment and murders them to use the body parts for constructing a chair. Kato, a representative of a chair company, finds his website on social media and suggests a meeting. She's quickly enamored with him both professionally and personally, unaware of his true nature as a serial killer.