secret /ˈsiːkrɪt/ : not known or seen or not meant to be known or seen by others. He knew he was protecting a powerful secret. And he knew the consequences. Did he have a choice? No. If safeguarding the secret would prevent hurt to his loved ones. He was prepared to die with it. Yoo Kihyun as Kim Seo-joon Reader as Yoo Hana Lee Hongbin as Choi Seung-won Lee Je-hoon as Park Hyun-wu Cho Miyeon as Ahn Min-seoAll Rights Reserved