Philémon De Montfilet came first in his year in the prestigious engineering school "Poly Art Technique" (a spoof on the Ecole Polytechnique ) but only because of an epidemic which brought all the other examination candidates down.Besides,he is an unwed father and his auntie wants this glorious nephew to marry her daughter who has other plans:she is in love with a crooner. Auntie's hubby is a radio broadcast host ,unbeknown to his missus;all the characters wind up in the studios where the champion tries to win the "five million cash" (check the title) ,in a show sponsored by Volubilis cosmetics.