Start with the character, let's say Luca again, downloading the movie. Then, during the download, he receives a strange message or file within the torrent. The message could be a warning or a clue leading him to a mystery related to the historical context of Caesar's death or the film's themes. Maybe the torrent is a trap set by a hacker group to expose piracy, but Luca ends up uncovering something else, like a hidden message from the past.