According to several cosmologists and physicians, there would not be one but several universes; parallel universes. A theory that has fascinated both scientists and the collective imagination. Amongst them, was Stephen Hawking. He dedicated a part of his life to the study of this theory. In a posthumous article, he claimed that it would be possible to detect these other universes thanks to the presence of radiations in our own universe. “The Call” is a fiction in which I search for the marks of these radiations. Luminous doors then appear, like crossing points to these parallel universes.