Yunho, Jaejoong, Yoochun and Junsu are the four orphans who was brought up in the same orphanage. Together they became friends, for once they had found someone to trust in people who they could really call true friend thru friend maybe one day soul mate. They thought they would always be together...
Until something tragic happen something that would change all their lives together. Guilt consumed their friendship, they blamed themself from what happen on that faithful night. Years later on the anniversary for his death, did they all come together. But this time instead of blaming one another, they were determine to find the cause of his death. The true impact of that night comes to focus. What was the real reason behind his death. With that in mind questions began to come to light, Was he murder? Or was it an accident? Along with a young boy named Changmin they will find the answers...
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Ten years to the day a young boy by the name of Changmin arrived at the orphanage. From the moment he step onto the ground and looked at the building did he feel he was being watched. Looking up he thought he saw a young boy around the same age at him staring down at him, but in the blink of an eye he was gone, Changmin blink a few times thinking maybe he imagined it. It took Changmin a while to get used to his new home, he explore the building many time, always coming upon a door that was locked.
“You can’t go in there.”
“Because… Something bad happened in there!” Changmin looked to the door, wondering was what he heard true. He later found out that the window he thought he saw the boy in was that room.  The next time he was sure he say the boy again he found himself running inside up the many flights of stair until he came to the door he tried to open it but it didn’t work. “Is someone in their?” No answer came… for days he sat outside looking up at the window he couldn’t ignore the feeling he saw someone up there even though the caretaker told him that room had been locked for over ten years. After a while Changmin found himself not thinking of the boy until they turned up, three older boys returned to the orphanage where they all became friend. That was the first time the boy did not disappear in the blind of an eye. From what he could see the boy was crying… as he looked down at them....
 
"Can you see him?" Changmin asked them.
 
"Who?” They asked.
 
"The boy up there..." All three of them looked at the 10 years old boy and then to where he was pointing.
 
"There's no one up there..." Changmin looked up. He told them the feature of the boy including the colour of the top he was wearing. They all looked so shock before returning the gaze to the boy. When they finished visiting, Changmin follows them around the orphanage looking for the answer but when they never answered him Changmin followed them looking for the answer he wanted. He followed them to a graveyard. Staying well out for sight when the three of them stood in front of a gravestone. He watched from afar... until they all left one by one all of them placing their hand on the stone. It wasn't until they left did he look at the gravestone they all stood in front.  He did as they did trace the outline for the name on the stone... For some reason he felt it was connected to the boy he seen. That night Changmin awake to the sound of someone crying, an echo that travelled down the halls. Looking around the room he share… no one else had awake… he followed the echo until he stood outside the room that was locked. He placed his hand on the door and called out the name… the same name that was written on the grave stone…

“………..,” With that  voice went silent….

 Will Changmin be able to find out who is inside the locked room? And who is it that is crying so sadly?