Down-and-out lounge singer Johnny Slade is hired by a mystery man to open a hot new club, the catch being he's given a new--and terrible--song to sing each night. Noticing that whenever he sings one a new crime is committed, Johnny gradually realizes his songwriter-benefactor is a powerful mob boss in hiding and his "Greatest Hits" are the only way the man can give orders to his crew...

Johnny Slade's Greatest Hits is the story of a struggling lounge singer who could never get a break. Johnny's luck changes when he lands a gig at a hot new club. Little does he know that the club is owned by a former high-profile mob boss, now in hiding. The Dean Martin wannabe soon learns his "Greatest Hits" are more than humble tunes. As his popularity rises, Johnny begins to draw a strange correlation between the songs that he is asked to perform and the morning newspaper crime reports...