Malvolio’s supposed madness has allowed the gleeful Maria, Toby, and the rest to lock Malvolio into a small, dark room for his treatment, and they torment him at will. Feste dresses up as "Sir Topas," a priest, and pretends to examine Malvolio, declaring him definitely insane in spite of his protests. However, Sir Toby begins to think better of the joke, and they allow Malvolio to send a letter to Olivia, in which he asks to be released.