Napo is working on a construction site and the film shows some of the common hazards and risks on site. As an employee, Napo is faced with many hazardous situations but manages to survive his ordeal.The film is produced for building and construction workers but is suitable for all sectors and all levels of employees, especially young people in training and work experience.The objectives are to raise awareness of the most frequent risks found on a building site and to give the opportunity to reflect on prevention measures adapted to the situation. The introduction shows different characters, Napo as a building worker, a colleague, the boss and the architect. Different risk situations are shown in seven short stories. Anti chute, falls from height, obstacle course, back pain, organisation of transport routes, hygiene and security of the site.