By the timeline of this film, Roth is based in Miami. Though in seemingly poor health, he is extremely wealthy, having made a fortune by running his own organized crime outfit, assisted by his right-hand man, Sicilian Johnny Ola. Roth forms a partnership with Michael Corleone for a profitable business enterprise with the corrupt Cuban government of Fulgencio Batista and a number of major American corporations. Roth secretly plans to assassinate Michael, partly to avenge Moe Greene's murder (as depicted in The Godfather). Roth instructs Ola to befriend Michael's brother Fredo, who inadvertently provides Ola (and Roth) information about Michael that enables them to mount an attack at his Nevada compound.