The YG organization has launched their TOP assassins in a conspiracy against the government and it's up to SM's intelligence team to stop them. Kim Heechul is an under appreciated assistant at the SM Security and Intelligence Agency. When Special Security Agent Choi Siwon arrives in the intelligence division, Heechul's life becomes more dangerous then he can handle.  

In a land covered in ice, there live men and elves. Winter has fallen over the realms. The snow is controlled by the great Elf King of the forest and his frozen heart. In the realm of men, live three friends desperate to break the snowy spell upon the land. They venture into the forest in search of answers, but instead, are into a world they do not understand. The realms of men and elves are not meant to mix.

“A fish may love a bird, but where would they live?”

Can Donghae tame the flame that is Heechul or will fire win over water once again? Donghae always had a connection with the water and a fascination for fire, two elements that should not mix. But, when they do, no one can deny the beauty they create. A story of destiny, romance, adventure and fantasy.