خلاصه داستان : سونگ جه کوچولو تمام شب را بیدار می ماند و برای برای سو هی، کسی که وانمود می کند پدرش در مریخ است، نامه می نویسد. سو هی به شهر دیگری می رود و …

Little Seung-jae stays up all night and writes letters to So-hee, pretending to be her father in Mars. Leaving Seung-jae's innocent heart behind, So-hee leaves for a big city. Both grown up to be adults, Seung-jae is a postman who writes letters to So-hee's grandma - the letters that never came from So-hee. So-hee's heart hardens after hardships in life and she comes back to her hometown and Seung-jae's heart swells up again at seeing her again...

خلاصه داستان : گیل سو هیون پس از فارغ التحصیلی از دانشگاه هاروارد به مدت 10 سال در FBI کار کرد. پس از آن تصمیم گرفت به کره جنوبی بازگردد. او اکنون به عنوان رهبر یگان ویژه افراد گمشده در حال بررسی پرونده مرموز سریال است

Gil Soo-Hyun is extremely intelligent. At the age of 10, he attended Harvard University. After graduating there, he decided to work at the FBI and worked there for 10 years. Afterwards, he decided to come back to South Korea. He now works as the leader of the Special Missing Persons Unit. The unit deals with about 1% of special missing cases involving violent crimes. His appearance borders on perfection, but he holds a secret. Detective Oh Dae-Young joins the Special Missing Persons Unit. He has worked as a detective for 20 years and he has an obsession in observing the law. He is known as a master of missing person cases.