Seo-yeon has one question that nobody seems willing to answer.What really happened to her brother?A year ago, he disappeared, and all her family got was an empty coffin. Everyone tells her to move on, but how can she when nobody can even tell her what happened?Then she meets Kang Do-yun.He's handsome, keeps to himself, and clearly knows more about her brother than he's willing to say. Seo-yeon wants answers, but getting close to him seems to bring trouble wherever she goes.And the more she digs, the stranger things become.There's a white orchid that keeps showing up, people hiding things they shouldn't know, and a world Seo-yeon never knew existed. Soon, she finds herself caught up in things she doesn't understand, surrounded by people she can't trust.And just when she thinks she's getting closer to the truth, she receives an invitation to a private masquerade party.Who sent it? Why was she invited? And what does her missing brother have to do with all of this?Seo-yeon wants answers, and she's not the type to back down.But some secrets are better left buried.And some invitations are dangerous to accept.