The first of three

Question

I found this word to be quite poetic and saw @PerpetualJ's comment (saying to make another riddle), so here it is:

It is the plot of many works
All in one word
The first step is to break it into three
And take the first and swap with the second
and what results is the first of three
Next, you must undo your last
and what you find is the second
Your last mission is to put it all back
and double the first two
and there you will connect the final three
and you will see
the answer

Disclaimer (Sort of a hint as well...):

In the process of solving, the word will be turned into phrases. The final answer should include the word, all the phrases, and the final phrase. (partial answers are still allowed)

Hint 1:

The first and third line is key to the word itself, then work on the rest.

Hint 2:

The word is not compound, yet it has words inside. Ex: Office => Off Ice

Hint 3:

The word is 8 letters long, so think small words that are in the word.

Hint 4:

You break the word into three parts and then you can do the actions it states, so you could find the three words first.

Hint 5:

The first word in the word is 2 letters, the second is 3, and the last one is also 3.

Answer 1

I think the answer is:

TOGETHER

It is the plot of many works
All in one word

A common plot in movies, TV and books follows the efforts of a man (or woman) to win the affections of the girl of their dreams, i.e. TO/GET/HER.

---

Part 1 - 'the first of three'
The first step is to break it into three
And take the first and swap with the second
and what results is the first of three

Break the word into three parts as above, and exchange the first two to get GET/TO/HER.

Part 2 - 'the second' [of three]
Next, you must undo your last
and what you find is the second

Put the words back in order and you have (as outlined at the top): TO/GET/HER.

Part 3
Your last mission is to put it all back
and double the first two

Put it all back to get TOGETHER and 'double the first two' [syllables] to get (!) an extra TO/GET.

'Connect the final three'
and there you will connect the final three
and you will see
the answer

Finally, put all three parts together to get one long tongue-twister of a phrase:
GET TO HER TO GET HER, TO GET TOGETHER!

Answer 2

Very partial, and most likely wrong, but could the first word be:

betrayal

That's the right number of letters (via hint), and a common plot in many books and movies.. And, it can be broken into three words (had to check that the last one is an allowed Scrabble word):

bet-ray-al or be-tray-al

As much as I want it to work, I can't make any of the follow-up instructions make any sense...