Im Yoona, a twenty two year old author, has just finished promotions for her second book, and now she is back in her apartment in downtown Seoul. Once upon a Friday, she suddenly wants to write again. But about what? Inside of her apartment, she couldn't find any inspiration to write, so she decides to go out and search Seoul city for a guiding light.

It's all she has been wanting to do since she was little – to write. And she has made it, two books even. But it still didn't feel enough for Yoona. She loves them and is proud of them like her own children, but they're still not enough. Maybe because there's something missing on both of her published book – her heart.

Meanwhile, Kim Jongin, or Kai, as people call him, is a twenty year old university student who dreams of becoming a performer. He's one of the best ballet dancer of his major, and with that unquestionable talent, it's not hard for him to become one, a pro at that. But Kai doesn't want to be a ballet dancer – he wants to be a hiphop dancer.

All this time, he's been dancing for himself, and only for himself, and he thinks by doing that, he's convincing himself that ballet is what he's good and will succeed at. But maybe, what Kai really needs is a little encouragement and someone to dance for.

And inside a café that smells like chocolate and love, they both found their muse they've been looking for.