Harry Overhears the Truth About Sirius Black's Betrayal

While hiding in the Three Broomsticks, Harry overhears a conversation between Professor McGonagall, Filius Flitwick, Rubeus Hagrid, and Minister Cornelius Fudge, where they reveal that Sirius Black was the Potters' Secret-Keeper and betrayed them to Lord Voldemort. Harry also learns that Black was his father's best friend and his godfather, a revelation that leaves him shocked and devastated.