<P> Michael returns to Sicily for Anthony's operatic debut at the Teatro Massimo . Suspecting that Altobello may make another attempt on his life, he has Vincent infiltrate Altobello's regime under the pretense of defecting . Michael and Kay tour Sicily together, during which Michael asks for Kay's forgiveness . Kay admits she will always love him . </P> <P> Meanwhile, the Immobiliare deal has stalled, supposedly because Pope Paul VI must personally approve it . Michael learns that the Immobiliare deal is an elaborate swindle concocted by Immobiliare chairman Licio Lucchesi, who schemed with Vatican Bank head Archbishop Gilday and accountant Frederick Keinszig to embezzle a fortune from the Vatican Bank, using Michael's "investment" to cover their tracks . Hoping to salvage the deal, Michael seeks Don Tommasino's assistance . He directs Michael to Cardinal Lamberto (the future Pope John Paul I). With Lamberto's prodding, Michael makes his first confession in 30 years, tearfully breaking down as he admits to ordering Fredo's murder . Lamberto tells Michael he deserves to suffer for his terrible sins, but that there is hope for redemption . </P> <P> John Paul I dies soon after being elected pope, poisoned by Gilday . Michael learns that Altobello (in league with the conspirators) has hired an assassin named Mosca to kill him . Mosca murders Tommasino, and Michael vows before his old friend's casket to sin no more . Vincent reports that Lucchesi, working with Altobello, is behind the assassination attempts on Michael . </P> <P> Weary of the bloody, lonely life of a Don, Michael retires, making Vincent his successor but not before giving him permission to retaliate . In return, Vincent agrees to end his romance with Mary . That night, Michael, reconciled with Kay and Anthony, watches his son's performance in the opera Cavalleria Rusticana . Meanwhile, Vincent orchestrates the murders of Lucchesi, Gilday and Keinszig, and Connie murders Altobello with a poisoned cannoli . </P>

Who does michael have killed at the end of the godfather