In 2018, accidents occurred more than two and a half million times in Germany, and almost 400,000 people were injured - many of them seriously. 3,270 road users lost their lives. On the other hand, mobility has become the self-image of our time. Whether by car, motorcycle or bicycle, Germans love their autonomous means of transport, and the economy is also dependent on flexible mobility on the roads. But how can people be prevented from paying for this with their lives? plan b accompanies police officers, traffic planners and victims of traffic accidents, among others. Which ideas and strategies for more safety on the roads are effective, which technical innovations make driving more reliable? Can a rethink at the political level save lives? And what can we Germans learn from our European neighbours in terms of road safety? The film provides answers.