Adapted from the Hollywood movie Cellular. This day was just like any other day. Single engineer Grace (Barbie Hsu) worked hard almost all night to send her daughter Tingting to school the next day. On the way, Huo Deneng (Liu Ye) deliberately rammed the car body. Grace fainted on the spot. When she woke up, she found herself in a closed container. While she was unconscious, she saw Huo Deneng searching her house and killing the maid. When she woke up, she was asked where the things were hidden. Grace, who knew nothing, had no choice but to connect a damaged phone after the gangster left and dialed Abang (Louis Koo) from the financial company. Facing Grace's desperate plea, Abang casually gave the phone to traffic policeman Fai Sir (Nick Cheung). Because he couldn't hear Grace's words clearly, Fai warned Abang not to make trouble again. After hearing the gunshot in the phone, Abang realized the seriousness of the situation and decided to help Grace. The first thing to do now is to intercept the gangsters who are heading to the school to take Tingting away as a threat. The second goal of the gangsters is to find Grace's brother, as they believe that the evidence of their crime is in her brother's hands. Along the way, Abang was mistaken for a robber and chased by the police. He was trapped and was surprised to find that Huo De Neng and his group were actually Interpol. He could only rescue them by himself by keeping in touch with them. The appearance of Hui Sir also brought a glimmer of hope to the situation.