Trust, Frump Tucker Theatre Company, at the Athenaeum Theatre. As directed by John King, Steven Dietz’s 1992 play depicts sexy if unsubstantial collisions between beautiful young urbanites. Becca, a working girl, is engaged to Cody, a rock star on his first stadium tour, who’s seduced by Leah, a former rock star, who’s the lust object of Gretchen, the sad-sack seamstress making Becca’s wedding dress–and a few unconvincing feints at lesbianism. Meanwhile bouncy, naive 20-year-old Holly wants any male rock star she can get, and charmingly awkward public-radio announcer Roy wants any girl at all–Holly will do. In this world, the fact that no one trusts anyone else doesn’t interfere with anyone’s sex life.

Trust moves quickly, offering witty if unrealistic dialogue in scenes (set off by ridiculous titles like “It Was Rope Connecting Us”) full of anger, mind games, and sex. These young actors nail the jealousy and passion–and occasionally the delicate intimacy–of short-term relationships, but too often they seem nonplussed by Dietz’s bons mots and leach them of humor and meaning. Only Elizabeth Varela as the jaded, insouciant Leah and Thom Goodwin as the wry Roy (whose monologue connecting girls with shoplifting stops the show) have found the guarded hearts of their characters. Steve Kouba, playing guitar and keyboard, provides an onstage sound track that adds just the right note, speeding the two hours along.