When a madman plants a bomb on a city bus with a deadly condition—it must maintain a speed above 50 mph or detonate—a resourceful police officer and a quick-thinking passenger must work together to keep the vehicle in motion while hunting down the terrorist. As the clock ticks and obstacles mount on Los Angeles streets, they face an impossible choice between stopping for safety or racing toward an uncertain escape. It's a high-octane battle of wits where any mistake could be catastrophic.
An extortionist bomber rigs a Los Angeles city bus to explode if its speed drops below 50 mph, forcing a young cop and a female passenger to keep it moving and save everyone on board.