 The plot then moves into Act Two; when Vardanes and Lysias hear Arsaces tell Bethas that he loves Evanthe, they decide to tell King Artabanus that Arsaces is a traitor for sympathizing with Parthian enemies.And that is all; like most plays with a five-act structure, there are usually one or two acts that are just one scene.This keeps the five-act structure, but does not mess with the believability of the plot.