A documentary with played scenes and real archive images about the adventurous life of American writer Jack London, creatort of the novels "Call of the Wild", "Wolfsblut" and "The Sea Wolf", who lived as a tramp, prospector, seaman, rancher, war reporter and as a committed member of the Socialist Party of America (SPA). He experienced the socio-political upheavals from the end of the pioneering era to the First World War.