Adam is a young Dubliner who ingratiates himself into the Owens family after meeting Lucy at the restaurant where she waits tables and sings. While wooing her, he becomes involved with her more reserved older sister Laura, a romantic literary type who spends most of her time at the library, her oldest married sister Alice, a new mother who is unhappy with her boring husband Martin, and her brother David, who seeks Adam's advice on how to seduce his repressed girlfriend, only to find himself nearly succumbing to Adam's charms himself. Revisits are made to several scenes, each seen from the point-of-view of a different character.
Stephen Holden of The New York Times said "Guilt-free and nearly devoid of erotic angst, About Adam is the flip side of movies like Teorema, Something for Everyone and those slogging Tennessee Williams dramas in which an irresistible, omnisexual stud is often an angel of death. Here he is an angel of sexual health in an impossibly euphoric world where sibling rivalry and sexual jealousy are only passing twinges of discomfort, not consuming passions. The movie's blissful spirits coincide with its portrait of modern, freshly-scrubbed-looking Dublin as the closest thing to Fun City the British isles have to offer nowadays." Emanuel Levy of Variety called the film "smartly sexy," a "brightly observed narrative," and "a frolic free of any judgments... marked by Stembridge's sparkling wit." He added, "Stembridge plays with shifting perspectives in a fresh manner that defies expectations of the romantic genre... This literate ensembler is propelled by talent behind and in front of the camera. Townsend, who physically resembles the young Terence Stamp, is perfectly cast as the dark, spirited outsider. Rest of the mostly female cast is equally deft and attractive." Maitland McDonagh of TV Guide rated it three out of four stars, calling it "sweet, likable and consistently engaging, if so insubstantial that it's always on the verge of blowing away" and adding, "Townsend pulls off the unenviable job of making Adam a chameleon-like seducer without allowing him to seem like a cad or a callous sexual opportunist... Stembridge deftly balances genre expectations with just enough stylistic flourishes to make it feel surprisingly fresh. The movie starts to fade from memory as soon as it's over, but for an hour and a half it's a pleasantly diverting lark."