Donghae is a merman.

Not really born as merman but had been cursed to be because of what his parents had done in the past...

Separated from his parents since young,  because the people had cursed and sued him for being different...

How can he escape from the judgement of the people around him?

Will he be able find justice for his fate?

Will he be able to be with his family again?

Will he be able to find his true happiness

or 

His true love???

All that questions he kept on asking himself..

But....

When and where??