Head of a bank center in Busan, Sung Gyu drives his daughter Hye In to her college entrance exam. A phone call comes in on Hye In's phone with a restriction on the number display (also known by the slang "black call"). She takes the call, and a voice tells her, "There's a bomb under your seat right now." And as soon as you stop and get out of the car, it's going to explode, she is told. In the middle of downtown Busan, the frightened run of Sung Gyu's family begins. "Restricted Call" is an urban chase thriller about a family in an unpredictable situation due to a mysterious phone call.