Kim Taeyeon, a young emergency medicine physician whose work in her whole life. On 18 August, she supposed to be on blind date that her bestfriend set-up for her, but here she is,with her white midi dress and jacket covered with blood and kneeling in front of accident victim. 

"Sir.. sir, I hope you can hear me. Please stay with me and stay calm. The ambulance is on the way now." Taeyeon ripped the sleeve from her jacket and tied it above the victim arm's to stop the heavy bleeding.

Darn it. What make the ambulance take so long time to arrive? 

"Sir, my name is Kim Taeyeon. If you can hear me, please tell me what your name?" Taeyeon hold the back of the victim head to check either he still conscious.

"K--kw--kwon...I--I don't know." The victim cringe and passed out.

He supposed to be on date with his girlfriend tonight to celebrate his birthday. By celebrate his birthday mean he travel from Korea to Japan to meet his on-off girlfriend. But not tonight. Absolutely not tonight. Because tonight something happen that change his life.