Who was Niels Bohr and what impression did he leave on the world? How did Niels Bohr manage to be awarded the Nobel Prize in Physics already at the age of 38? Why did Germany, the Soviet Union, the United States and Great Britain vie to get their hands on him during World War II? And was it Niels Bohr himself who invented the atomic bomb? Through interviews with Bohr's family and Danish and international researchers, an intimate portrait of the Danish scientist who revolutionized the world is given.