Heesung turned 26 this year, April 19th is his birthday. His parents arranged a party . His dad, Lee Gil Dong and his mother Park Hwa Soo were welcoming the guests. His dad was the CEO of a big company named Lee Groups of Honor. He was a billionaire who was in his 60s. Heesung had a younger sibling named Ae Ri. She turned 19 this year. She was studying business.

The guests were seated to wish him happy birthday. Heesung welcomed the guests with his parents. Heesung cut the cake, and received the gifts. He was asked to give a small speech on his birthday.

He began: Today, I am happy to have you all here on my birthday. Everyone here is from a prestigious family, thank you for spending time to attend my party. I hope we can get along in the future.

In the middle of his speech, a man in the crowd interrupted him saying your always full of yourself. It was his friend, Baek Inha. Heesung started to laugh and replied," No, I am not, maybe I am. Why do you care?"

Everyone in the crowd started laughing and the evening ended happily. Heesung was in his room, he heard someone knocking on the door. It was Ae Ri, he told her to come in. She went inside and gave him a gift. Heesung received the gift and asked," didn't you already give a gift to me."

Ae Ri replied," Yes....., This.. is.. from Kim Dahyun. Heesung threw the gift on the ground after hearing her name. Kim Dahyun was Heesung's ex. She was the one who broke up without any reason after being in a relationship for two years. Heesung hated her from then on. Heesung asked her sister to leave. Inha rushed there after hearing the loud sound of the gift breaking. Inha saw the gift that was broken. He went inside and gave a letter. Heesung looked at Inha with a questioning look. Inha told that letter was from Dahyun.

Heesung refused to read the letter but Inha insisted.

Heesung decided to read the letter because of Inha's plea.

He read:

Hi Heesung! I hope you are doing well! I know it must have been painful that I broke up with you without any reason. I thought this would be less painful than saying I am going to die soon. A day before we broke up, I found out that I had a brain tumor and I would die soon. I am sorry for hiding it from you. I didn't want to upset you. I couldn't come up with a reason to break up with you. That is why I did it without any explanation. You can do better without me as you did for the past month. I hope you won't be held back by anything. I will always wish for your well-being. I apologize for breaking your heart. I never thought I would reveal the truth to you but I didn't want you to be kept in the dark for your entire life. I hope you like the last gift I gave to you. By the time you read this letter, I will be dead. So don't come searching for me.

                                                                          - Yours Lovingly  Kim Dahyun

His eyes were filled with tears as he read the letter. He hated himself for misunderstanding her intentions. He picked up the gift he threw and opened the cover. The glass box outside was broken. He saw photos of himself inside the box. There were hundreds of photos of himself. He never knew that he was captured in the photo. He remembered that Noh Dahyun's hobby is to take pictures. But whenever he asked to take his pictures she came up with a reason . It turned out that she was lying and she took his pictures without him noticing. He was crying all night. He sat on the terrace seeing the stars and remembering the moments they spent together. Inha stayed by his side to comfort him. He kept the pictures safely in his room. He was depressed for a lot of days.

Days had passed before he started to live his daily life after moving on. He decided to go to his father's company to help him with business affairs. On his way to the office. He saw a man running away from the police. It seemed like a pickpocket case. He followed the man in his car and finally caught him after following him for quite some time. He handed over the man to the police. The police thanked him. Then, he headed straight to his dad's office. But he felt like something was odd with the man. He talked to Heesung as if he knew him. He felt like he had a deep bond with him. But he ignored it thinking that was some crazy thoughts in his head.

He reached the building, he searched for his dad. The secretary of his dad asked him to come to his father's cabin. He told to come soon as he had an important matter to discuss.