Kidong is an exploration crew member of ASA (not NASA), aka Asia Space Administration. He leaves ASA to raise his daughter, Kyujin, after his wife and colleague, Sunho, dies during childbirth. One day, he has a mysterious experience meeting Sunho from a different dimension and decides to go back to space to search for her. He boards the secret spacecraft, Super Nova, based on the blueprints left behind by Sunho.
| Actor | Role |
|---|---|
 Son I-yongNam Gi-dong | Nam Gi-dong |
| KKang So-yeonNam Gyoo-jin | Nam Gyoo-jin |
| JJung Kwang-wooCha Seung-yeon | Cha Seung-yeon |
| KKwon Su-jinPark Seon-ho | Park Seon-ho |
| JJo Geun-jikDeputy Director | Deputy Director |
| SSeo Hyun-minExpedition team head | Expedition team head |
 Byeon Dong-wookNot listed | Not listed |