David Essex seems believable as he portrays “Jim MacLaine,” building on the character introduced in "That'll Be The Day" from 1973. Performing sporadically with his group, "The Stray Cats," they secure an audition thanks to their roadie, "Mike" (Adam Faith). A producer shows interest but reshapes the band’s structure, replacing “Johnny” (Paul Nicholas) with MacLaine. Any initial feelings of letdown and competition ar…