On a platform that resembles an old forum, user Surveillante3000 seeks to identify a mysterious lady who has asked them to photograph her. Through the inconsistent testimonies of other users and the accumulation of flaws and clues, a sinister narrative develops, until the enigmatic lady takes on the role of a concept rather than a person. La Surveillante adopts a narrative structure inspired by the writings of Dennis Cooper, tracing how fragments, rumors, and contradictions can accumulate online and generate urban legends.