Phoenix (Park Sang Won) is 16 years old and she is the newest singer in YG Entertainment. She knows how to make the coolest raps, has an incredible dancing skill, and also the best vocals. In fact, she has many talents. She is practically in the top of the K-POP industry. But she hides a secret that can destroy her career -and her life- in seconds.

She meets Choi Jun Hong a.k.a. Zelo, is a member of the boyband B.A.P. His concept and image are the ones of a robot, a little bit shy and always following Bang Yong Guk. But, what will happen when this robot claims for independence? Zelo's heart is like his concept: Dried, Cold, Impenetrable and made of Steel.

What will happen when the Steel meets the Fire?

Are the hidden past and the rotten hearts going to burn and never appear again easily?

Can love surpass the difficulties and unite two damaged hearts?

"I have been told that fire can burn everything... even steel."...........

................"The steel doesn't burns... it melts with the fire, to be forever united to it."