He, Yves Dorget, is a major reporter in a daily newspaper. She, Catherine Carré, is a TV news anchor. They had a love affair together, when she was a young beginner journalist, but her ambition and her desire to arrive had separated them. Today, the news brings them back together: he is taken as a hostage and then released by a thug on the run, a thief but not a killer. She holds a cassette proving the compromise of the Prime Minister in a political assassination. The two cases overlap. The news item joins the underside of politics. How will both react? For him, his professional conscience going hand in hand with his rigorous morality, there is only one truth that we owe to the public. For her, the path to choose is more difficult, divided between rediscovered love, her demand for professional integrity and - the seduction of an ambiguous solution. Who can truly secure the "4th Power"?