Joan accepts a leading role on a new film despite her deteriorating health; faced with a new rival, Bette reflects on her misplaced feud with Joan.
With production of "Hush... Hush, Sweet Charlotte" underway, the feud intensifies when Joan learns of a new producer on the project; Bette reveals her vulnerabilities to Bob in an unguarded moment.
Hungry for another hit, Warner pressures Aldrich to bring the original team back together for a follow-up horror film; someone from Joan's past poses a threat.
Bette is on track to win a record-breaking, third "Best Actress" Oscar; Joan and Hedda launch a clandestine campaign against Bette.
Bad word-of-mouth plagues "What Ever Happened to Baby Jane?" on the eve of its release; Bette and Joan brace for failure; Pauline tries to break gender barriers; Oscar nominations are announced.
As the film production reaches its climax, the feud becomes physical; Bette's relationship with her daughter becomes strained when she bonds with a new cast member; Joan reveals an intimate detail about her past.
With production on the film underway, Bette and Joan form an alliance, but outside forces conspire against them.