Nadat hij zijn vader op jonge leeftijd heeft verloren, neemt Yong-hu afscheid van zijn christelijke geloof en kiest ervoor om alleen in zichzelf te geloven. Nu hij wat ouder is, is hij kampioen in vechten en lijkt alles te hebben wat hij begeert. Maar dan verschijnen er plots wonden in zijn handpalmen. Hij zoekt hulp bij de lokale priester Ahn.
Nee, helaas is 사자 nog niet beschikbaar op Netflix in Nederland.
| Visual Effects | Jeon Gun-ik | Special Effects Supervisor |
| Crew | Kim Yong-ho | Stunts |
| Visual Effects | Seo Byeong-chul | VFX Supervisor |
| Crew | Choi Kwang-rak | Stunts |
| Crew | Lim Wang-sub | Martial Arts Choreographer |
| Writing | Lee Yoon-ho | Storyboard |
| Visual Effects | Jay Seung Jaegal | VFX Supervisor |
| Sound | Yoo Seok-won | Sound Effects |
| Visual Effects | Ha Jae-gu | VFX Supervisor |
| Editing | Hwang Eun-ju | Assistant Editor |
| Crew | Jeong Seong-ho | Stunts |
| Sound | Lee Soon-sung | Production Sound Mixer |
| Lighting | Park Jun-gyu | Lighting Director |
| Camera | Kim Seong-o | Key Grip |
| Costume & Make-Up | Seol Ha-un | Special Effects Makeup Artist |
| Art | 김학현 | Set Decoration |
| Sound | 박진홍 | Sound Effects Designer |
| Directing | 김주환 | Director |
| Writing | 김주환 | Writer |
| Production | Cha Won-chun | Executive Producer |
| Production | Park A-hyoung | Co-Producer |
| Production | Park Sung-hye | Producer |
| Production | Shin Pil-soon | Producer |
| Sound | Koo Ja-wan | Music |
| Camera | Cho Sang-yun | Director of Photography |
| Art | Lee Bong-hwan | Production Design |
| Costume & Make-Up | 채경화 | Costume Design |
| Costume & Make-Up | Son Eun-ju | Makeup & Hair |
| Editing | 김선민 | Editor |
| Sound | Park Yong-gi | Sound Supervisor |
| Art | Pi Dae-seong | Special Props |
| Production | Jeong Gyeong-jae | Executive Producer |
| Sound | Jang Cheol-ho | Sound Designer |
| Production | Im Jun-hyuk | Producer |
| Art | Park Jun-yong | Props |
| Crew | Park Young-sik | Martial Arts Choreographer |
