Glen Hansard es un cantante y compositor que interpreta sus canciones por las calles de Dublín, cuando no está trabajando en la tienda de su padre. Durante el día, para ganar algún dinero extra, interpreta conocidos temas para los transeúntes, pero por las noches, toca sus propios temas en los que habla de cómo le dejó su novia. Su talento no pasa desapercibido a Marketa Irglova, una inmigrante checa que vende flores en la calle. Ella tampoco ha tenido suerte en el amor y, para sentirse un poco mejor, escribe canciones sobre el tema, pero, a diferencia de Glen, nunca las interpreta en público. Glen y Marketa, acaban de improviso haciendo un dueto en una tienda de música, y será entonces cuando descubran que algo les une...

Winner of the World Audience Award at Sundance, Once starts out as a small-scale romance, like Before Sunrise, before arriving somewhere unexpected. An Irish busker (Glen Hansard, the Frames and The Commitments) meets a Czech flower seller (Markéta Irglová) while singing on the streets of Dublin. (In the credits, they're listed as Guy and Girl.) She likes what she hears and lets him know. Turns out she's a musician, too. They work on a few songs together and a friendship is forged. She lives with her widowed mother, who doesn't speak English. He lives with his widowed father, who owns a repair shop. Since he broke up with his girlfriend, the guy has been drifting, unable and unwilling to get his life in order. The girl encourages him to pursue a record deal, and the guy emerges from his funk. Then he makes a move on the girl, who rejects his advances. He's confused, but as he comes to find, there's a reason she’s keeping her distance. Though Once is filled with appealing folk-pop by Hansard and Irglová (released on CD as The Swell Season), the movie isn't a traditional musical, but rather a more optimistic Brief Encounter. Filmmaker John Carney, Hansard's former bandmate, captures the real city--in all its affluence and poverty--rather than the picture postcard version. His beautifully shot film serves as a heartfelt ballad about all the underclass Guys and Girls swept aside amidst Ireland's economic miracle. --Kathleen C. Fennessy