Stylish Korean horror starring Ji-Won Ha as an investigative reporter who, having recently published a controversial article about sex scandals, has begun receiving a series of menacing phone calls.

In an effort to escape the calls, she changes her number and moves house. But the calls keep coming - and when her friend's young daughter innocently answers the ringing phone, she starts to scream in terror and goes on to exhibit increasingly crazed behaviour. As she tries to unravel the mystery behind the phone calls, Ji-Won uncovers the terrible secrets that lie behind her new phone.