A provincial young man with aspirations of becoming a private investigator is approached by a stranger that promises 100 million lire if he provides evidence of the existence of Jesus Christ.

Having been assigned by his publisher to write a biography of Omar Sivori, the great footballer, Ugo Sanfelice heads for Torino. Given he is not very knowledgeable about soccer, Ugo tries -several times but in vain - to obtain an appointment from Sivori. Forced to fall back upon persons being or having been in contact with the elusive star, he gets to know young forward-center Moretti and soon becomes friendly with him. The young man confides in him and tells him the whole truth about his own "career" : the training in a small provincial team, the promising debut alongside Sivori, the desertion of his fiancée, the premature decline due to a dissolute life. When Sanfelice finally meets Sivori, he finds that the star is no match - humanely at least - for Moretti and he gives up writing the book at all.