Due to the playful game called destiny, we find people who would ultimately change the course of our lives.

And because of destiny, three people who are in search of love and happiness, find each other at the most anguish state of their lives.

Luna Park, who happens to be one of the most successful busineswoman of her generation, finds herself in despair as the love of her life - her best friend - Onew Lee is involved in an accident that might take away his life. And what makes the whole situation a whole lot sadder is the fact that she must marry a complete stranger for the sake of her father's love and happiness.

Onew Lee, a happy-go-lucky young man, finds himself crying due to the loss of a love he never had. All his life, he only wanted to love and to experience happiness - something he had been searching so hard for.Unknown to many, his happy smile is just a mask of what he truly feels inside. He gets involved in an accident that changes the lives of the people who loves him.

Lee Donghae, a rich businessman's son, wanted nothing out of life but success. But this success has a price to pay - he must marry Luna Park. He agrees to the arranged marriage, depite the fact that someone already owns his heart. After all, success was the only thing important to him. Or at least, he thinks so.

Three lives, who had been victims of destiny's playfulness.

Can they ever obtain the happiness that destiny forgot to give them?

Or would their hearts be forever filled with a gallon of sadness?