When her son who lives in a single room is given an outrageous $1,000 water bill, a mother decides to become a detective and find out what is behind it.
| Writing | Lee Yo-sup | Writer |
| Directing | Lee Yo-sup | Director |
| Production | Jeon Go-woon | Producer |
| Sound | Kwon Hyun-jeong | Music |
| Editing | Lee Young-lim | Editor |
| Production | Kim Bo-hee | Producer |
| Writing | Jeon Go-woon | Adaptation |
| Sound | Park Yong-gi | Sound |
| Camera | Lee Hyo-jae | Director of Photography |
| Costume & Make-Up | Ji Ji-yeon | Costume Design |
| Art | Bang Gil-sung | Production Design |
| Art | Pi Dae-seong | Special Props |
| Editing | Kevin Kang | Digital Intermediate |
| Art | Kim Deok-du | Set Decoration |
| Production | Kim Tae-gon | Executive Producer |
| Sound | Lim Byeong-woo | Sound Director |
| Lighting | Kim Bo-hyeon | Lighting Director |
| Editing | Ryu Yeon | Digital Intermediate Producer |
| Costume & Make-Up | Pi Dae-seong | Special Effects Makeup Artist |
| Editing | Kim Il-kwang | Digital Intermediate |
| Visual Effects | Jeon Gun-ik | Special Effects Supervisor |
| Crew | Kim Yong-ho | Stunts |
