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
Josef K. wakes up one morning to find that he's been arrested on a mysterious charge.
Act II
The court proceedings do not go well for K., and, with no positive outcome in sight, K.'s professional and personal lives deteriorate as well.
Act III
K. is executed at a remote stone quarry outside of town.