Retired bomb expert Payne (Dennis Hopper) was dissatisfied with the government's retirement policy and had the idea of revenge on society. He first installed a bomb in the elevator, took hostages and extorted $1 million in ransom, but was dismantled by SWAT Jack (Keanu Reeves) and rescued the hostages. Payne escaped in the chaos. Payne did not give up when his plan failed. He continued his crazy plan. This time he blew up a bus and installed a bomb on another bus. As long as the speed of the bus exceeded 50 miles per hour, it could not slow down, otherwise it would cause an explosion. When Jack caught up with the bus, the bus was already full of passengers on the highway, and the speed had already exceeded 50 miles per hour. Jack is commonly known as "courageous hair". He ventured onto the bus, and the life-and-death speed between him and Payne began.