When Marilena Lisa, a beloved TV hostess poised for a career leap to Italy's national stage, becomes the subject of a sinister plot, it falls to Luigi Ferro to untangle a web of betrayal and deceit.

Marilena's sister has sought Ferro's expertise, convinced that her glamorous sibling is trying to kill her to bury a shared past of poverty and struggle. As Ferro delves into the case, he quickly discovers that the list of people with grievances against Marilena is longer than he'd ever expected. From scorned lovers to embittered ex-husbands, the shadows of Marilena's past are catching up to her at the worst possible time.

As the fateful day of Marilena's final broadcast in San Marino draws nearer, the stakes soar. Not just careers but lives are on the line. Can Ferro solve the puzzle before the red 'On Air' sign lights up one last time, sealing a deadly fate?