"Lady Choi, young master Yeon Woo is feverish, we tried to make him sleep but it did not work ma'am" the servant said as she entered the room of Yeon Woo's mother. The woman nodded and walked to her son's room.

"Mom?" her son whispered, she smiled at him and after she took a book from a shelf she sat beside her son. The boy was looking at the cover of the book

"The... the tale of king Jinheung?" the little boy asked

"Yes dear, your favourite one" she replied caressing his forehead. He smiled at her and closed his eyes, waiting for her mother to start reading.

"Once upon a time... the kind and noble Jinheung became king of the ancient kingdom of Silla... one day, he found the love of his life among the walls of his majestic palace... however, his soulmate wasn't a princess nor a servant..." Yeon Woo's mother thought that her son was already asleep so she tried to close the book.

"Continue mom... please..." the boy murmured, she chuckled and opened it again.

"He fell in love with his bravest general, Moo Myung... he decided to tell him the truth, so, during a training, king Jinheung went to the general and ordered: come with me... we have to talk. The king and the general went to a small empty room. Jinheung came closer to the hwarang and whispered: Moo Myung... I... I love you..."

"And what happen next mom?" Yeon Woo asked excited

"You know what happened my dear... Moo Myung shook his head, he said that they couldn't be together... that he was married to Ah Ro, a girl they both met during their years of training as Hwarangs... Jinheung understood it... he knew it was silly to keep trying, an year later, on the anniversary of the king's confession, Moo Myung's son was born"

Yeon Woo was about to fall asleep but he tried his best to stay awake and listen to the end of the story. He rubbed his eyes a few times and looked at his mother expectantly.

"Jinheung knew that he had to be happy for Moo Myung, but he couldn't, the same day he woke up in his bed... and everything was just black... gray... and white... after a year the kingdom received its heir... but just like his dad, the little boy couldn't see the colors of the rainbow... for years the king refused to see his general, the pain in his heart was too much to handle..."

Yeon Woo's mother stopped a moment to look at her son, he was already asleep but she decided to finish the tale just as her son asked.

"On a sunny day Jinheung's son went in the garden to play with Moo Myung's child, all of a sudden Jinheung heard his son screaming, he ran outside the palace, his son ran to him and pointed at the flowers of the garden: I can see them! Look! Dad! They are so beautiful! His son shouted, Jinheung accidentally looked at the general who was there as well... and all of a sudden the world became colorful again..."

"Thanks... mom..." Yeon Woo said and finally fell asleep.

Yeon Woo really loved that story, he wanted to find his soulmate just like her mother... but what her mother didn't say was that the tale didn't end there.

King Jinheung became obsessed with his hwarang... he loved him, he wanted him... and when he understood that all this was driving him crazy, he went to his room and took a dagger, the world was gray once again, Moo Myung ran to the king's bedroom, he found him on his bed covered in blood.

"Moo... myung... Sun woo..." the king whispered

The hwarang came closer to him and tried to press on the wound, his eyes watered and salty tears fell onto Jidwi's hands. The king raised his hand, he stared at the hwarang's eyes and smiled, feeling his last color rush.

This is where Monos and Probes come from... the descendants of the king are cursed to be monos... and look for the probes that were born in Moo Myung's family...