Need your help
Read the short story and identify the important part of the plot in the story you read.

"The Mysterious Ring of the Beautiful Queen"
The king of Calvar, King Damian, was long dead. His Kingdom can be found in the farthest east of the world. It was left to his wife, Reyna Marikit.
The king and queen had four sons. They are Prince Diego, Prince Faustino, Prince Tales, and the youngest, Prince Marfino. Many wonders which of the four princes will be the heir to the Kingdom.
Only one can inherit the Kingdom. Nevertheless, unbeknownst to many, it was not the Kingdom that the four princes wanted to inherit, if not their mother's magical ring.
Only King Damian and their children know that Queen Marikit's ring is the reason why the wealth of their Kingdom is inexhaustible.
One day, the queen felt that she was really weak and she needed to decide to whom to give a ring. He accepted that he could disappear at any time.
For the queen to know to whom she should give a ring, she called the four sons and gave them much gold.
"Go to the other Kingdom. In the Kingdom of Tipora. Each of you should bring two sacks of gold. It is up to you what you do with the gold you bring there, "the queen said to her four children.
The brothers quickly grabbed two sacks of gold each. They rode on their horses and set out for the Kingdom of Tiphsah. When they got there, Prince Diego saw the princess of Tipora.
'Oh beautiful princess, I'm sorry, but my sisters and I are here to see if you're all right here?' said the prince, to the surprise of his brothers.
The three princes left and left Prince Diego, who was very nice to the princess. They talked all day, but the princess obviously didn't like him until she heard some nice words.
"I have two sacks of gold. "I would like to give it to your kingdom as a gift," said Prince Diego, who changed the princess's treatment of him. Because of this, he got the heart of the princess.
While traveling in Tipora, Prince Faustino suddenly stopped at a place where many were selling beautiful garments and jewelry. He stayed there, and there he used the gold he was carrying.
'They belong to me, the next king of Calvar,' said the prince while shopping for clothes to buy.
As Prince Tales and Prince Marfino traveled, they came to a part of the Kingdom where many farmers, slaves, and beggars lived. There, Prince Tales handed out a sack of gold he was carrying.
"My brother doesn't seem to be feeling well. "Prince Marfino said to himself while watching what Prince Tales was doing.
Before dark, the brothers traveled back to Calvar. Prince Diego and Prince Faustino no longer carry gold. Prince Tales brought back a sack of gold, and Prince Marfino still had two sacks.
When they arrived at Calvar, the three princes immediately rested while Prince Tales headed to the Eucharist, the place in their Kingdom where ordinary workers lived.
There, the prince entered the houses and handed out the gold he had brought. The people were very happy about this.
The next day, Queen Marikit summoned the four princes. There he told his children his decision about the Kingdom and the magical ring.
"My dear prince's, I have decided to whom the rule of the Kingdom and the magical ring will go. It hurts me to choose you, but I have to do it, and I hope you understand.
Diego, PrinceI cannot give you a ring because it cannot be used for personal intentions. It does not belong to you like the gold you gave to the princess to get her. The Kingdom is its owner.
As Prince Faustino said, royalty is not measured by dress. It measures how you take care of your Kingdom, including its wealth.
Prince Marfino, you are the only one who did not use the gold you brought to Tipora. Even when you come home here, there is no discount. However, I hope you understand that the hidden wealth does not grow. Many people need it.
So, I decided that the next king of Calvar would be Prince Tales. The magical ring will also go to him. He is like your father, who wants to help the smallest people in the Kingdom.
Prince Tales also did not hesitate to help the poor in the other Kingdom. You know that the wealth provided.