The crashing sounds. The horrible screaming, and yelling. What was it you say? The pain and horror of fire. Furious fire roaming her home. Killed her mother, and father. Left was only her her sister and younger brother. The sight was so blurry. Everything happened at once. It was unbelievable! 
Through out the fire, she was looking for her brother. There, her sister found a way out of the house. Begging Dara to go with her. Dara shook her head."I'M NOT LEAVING WITHOUT OUR BROTHER!" She screamed to her sister.
The older sister nodded with a sad face, saying she will not turn back. Dara feeling furious she looked back for her brother. She knew if she wasn't gonna be there in time, he was gonna lose faith. She quickly look for him. No sign of the poor thing. 
She began to cry. Being worried, she ran out of the house. Leaving her baby brother in the fire house. 
"SANGHYUN!!" She screamed out of the house.  Sooner or later, she ran off looking for help. 

Years has past, and Dara became a nurse at Jaeneung city. The memory of the fire has faded away throughout her life. But, she hadn't forgotten about her brother. She kept her love, and care for him. 
Until this day, she is STILL looking for him. Still believing he is alive. She still feels his appearance, and still believes he is somewhere near her home.
Sandara never contacted her sister after the incident. Dara couldn't believe her sister would ditch her and their brother. From this day on, she will NEVER go near her again. SHE WILL stay there for her brother. 
Even if it means, risking her life.

"Where ever you are, i'll find you. We'll unite again. Were unstoppable Sanghyun sshi. Please don't lose faith. Noona is here. Noona is looking for you. Don't go away. I'm so sorry for leaving you in that house. I'm so sorry."