Johnny "Hollywood" Hogan owns the ballroom on Magnolia Street, where sisters Kate and Shirley Winters, along with other regulars, go every Saturday night—to escape the realities of Belfast life, and to seek fun and romance.

Free-spirited Shirley has a mad crush on a boy named Declan Greenwood, while thoroughly modern Kate likes plenty of variety in her wardrobe (and her love life) and is determined to get married before her younger sister. She'll take anyone who'll have her, even if it has to be that greasy — though not entirely unattractive mechanic who has been hanging around lately. The crowd at Hogan's is always lively, but that doesn't mean all problems have been left at the door. Johnny's grandparents are afraid that he'll retire and shut the ballroom down. Johnny yearns for Marion, his old love, while Marion starts to worry that her long-held secret will finally be revealed.

But it doesn't take long for all of the ballroom's patrons to discover that, even without velvet-lined balconies and crystal chandeliers, the magic of the twinkling lights and soft music will help them find just what they're looking for—whether it be family, friendship, or even true love.