Original: It involves Olivia's uncle, Sir Toby Belch; another would-be suitor, a silly squire named Sir Andrew Aguecheek; her servants Maria and Fabian; and her father's favorite fool, Feste.
Simplified: Meanwhile, in Olivia's house, Sir Toby Belch (her uncle) has hoodwinked a foppish Sir Andrew Aguecheek into supporting him by convincing him that he could be a suitor to Olivia. There is a running feud between Malvolio and Belch; with the help of Maria, Olivia's maid, and Feste, a clown, Belch plots to make a buffoon of the steward.