The story of a touch-and-go romance between two Mainland expats, earnest Northerner Leon Lai and Guangzhou-born wheeler-dealer Maggie Cheung, Peter Chan’s profoundly touching drama follows its leads from youth to maturity, upper-class security to the slums, and between Hong Kong and New York City, bidding bittersweet goodbye to the dreams of youth, the old HK that William Holden once visited, and the plaintive voice of Teresa Teng, which echoes through the film.