For a three-act plot analysis, put on your screenwriter’s hat. Moviemakers know the formula well: at the end of Act One, the main character is drawn in completely to a conflict. During Act Two, she is farthest away from her goals. At the end of Act Three, the story is resolved.
Act I
John Proctor learns that Abigail Williams is lying and fabricating stories of witchcraft throughout Salem.
Act II
After John Proctor tries to save his wife from the witchcraft charges in court, Proctor is arrested and incarcerated on charges of witchcraft, with the threat of death if he does not confess.
Act III
John Proctor chooses not to confess to witchcraft and is spiritually redeemed and reconciled with his wife; he goes like a hero to his death, with his goodness and integrity intact.