Soon after getting a new phone, a woman notices strange things starting to happen. When she investigates, she discovers that everyone who has had her phone number before her has died suddenly and mysteriously.
| Actor | Role |
|---|---|
 Ha Ji-wonJi-won | Ji-won |
 Kim Yu-miHo-jeong | Ho-jeong |
| CChoi Woo-jaeChang-hoon | Chang-hoon |
| CChoi Ji-yeonJin-hee | Jin-hee |
| EEun Seo-wooYeong-ju | Yeong-ju |
 Choi Jung-yoonJa-yeong | Ja-yeong |
| JJeong Seong-hwanJin-woo | Jin-woo |
 Lee Seo-yeonMi-ran | Mi-ran |
| PPark Min-gwanDetective Kim | Detective Kim |
 Kim Gyeong-ryongSecurity Guard | Security Guard |
 Oh Chang-kyungTaxi Company Employee | Taxi Company Employee |
 Jung Woon-sunHigh School Student | High School Student |
| CCha Mi-jeongHigh School Student | High School Student |
 Lee Ji-yeonHo-won | Ho-won |
 Hyun Sook-heeJin-hee's Mother | Jin-hee's Mother |
 Lee Jin-heeStudent | Student |
| CCha Mi-jeongStudent | Student |