Carl, a construction businessman, suddenly received a strange phone call when he was taking his children to school one day, saying that there was a bomb in the car, which would explode as soon as he left the seat, and he would blow up the car remotely if he called the police. The narrow space in the car immediately magnified the uneasiness and tension of the three people. The plot keeps reversing in the middle of the plot, and the police investigation results unexpectedly lock the suspect as Karl himself. With the passage of time, how will Karl solve the multiple crises that he is about to lose all his wealth, life and even his family? What kind of reversal will happen in the end?