Duration is about half of the duration of the story.
In the second act, the main character faces numerous obstacles to achieve their dramatic need i.e. what they want to win, get, find out, achieve, or implement.
When you know the dramatic need, you can come up with and write to it opposing obstacles that the main character overcome in the story one after another. Obstacles can be internal or external.
The second act is divided into two halves separated by a central point.
The first half
At first, the main character is doing well. They will survive obstacles and manage the situation.
Pin 1
Remind the listener and the main character of the theme of the story and of the goal main character is after! What would happen if the main character failed?
The center point
The center point is the middle of the story. The main character must face themself. Is the goal worth persuing?
However, something irreversible has happened and there is no going back. The journey must continue at any cost.
The second half
But luck turns. The adversities accumulate.
Pin 2
Remind the listener and the main character of the theme of the story and of the goals the main character is persuing!
Plot point 2
The main character is far away from solution the problem. They have reached the nadir. How about the main character now?