That Sun in the Sky, with the original title "저 하늘에 태양이", is Drama, & Soap , which premiered on September 7, 2016, available to stream on KBS2. It consists of 1 season, with 121 episodes.
In-Kyung gives up studying to support her stepmother and younger stepbrother Han-Soo. The stepmother sells In-Kyung to become a concubine to support her son Han-Soo. In-Kyung boards a train for Seoul after learning her fate. In Seoul, In-Kyung goes through numerous hardships to achieve her dreams and to attain love.