Based on a joking suggestion by Parmeno, Chaerea decides to substitute himself for the eunuch in order to get into Thais's house and he forces Parmeno to cooperate. Since he has been away on military service, Thais and her household staff do not know his face. Chaerea's plan works, and he is accepted as a eunuch and put in charge of guarding the girl with whom he is so strongly infatuated. When he is left alone with her, he rapes her, and then, discovered by Thais's maid Pythias, he flees the scene.