At the opening of Canto IX, Dante, waiting outside of the gate to the City of Dis, is afraid. The poets have a few minutes to talk, and Virgil tells Dante of the time when the sorceress Erichtho summoned out a spirit from the lowest circle of Hell. Virgil reassures Dante, again, that no one can stop their journey and asks him to remain where he is, because Virgil will not abandon him.
However, the conversation is short because the angels rush back and slam the gates shut. Virgil returns to Dante, sighing because the fallen angels bar the way. However, Virgil tells Dante that an angel from Heaven will descend to open the gates.
Virgil listens intently for the arrival of the angel because he can't see through the heavy mist. He regrets that he and Dante couldn't enter the gates by themselves, but they were promised help, though it seems long delayed. Dante is alarmed and asks his guide, in a roundabout way, if anyone from the upper circles has ever made this descent. Virgil answers that he was once sent to summon a shade from the circle of Judas, far below here, so he knows the way well.
Three Furies spring into view, saying that they should summon Medusa to turn Dante to stone. Virgil cautions Dante to hide his eyes against the beast, placing his own hands over Dante's eyes.
