Isaac is divorced from Jill, who is now a lesbian, so he's indulging his midlife crisis by dating Tracy, a 17-year-old high school student. But it turns out he might really be in love with Mary, who's having an affair with Yale, who's married to Emily, who's been reading the book Jill is writing about Isaac. Set all that incestuous tomfoolery against a gracefully captured black & white New York City and the sounds of George Gershwin, and you have Woody Allen in his prime-a man capable of digging below our earthly anxieties, if even for a moment, to figure out what makes life worth living. Golden-skinned ingénue Mariel Hemingway was only 16 at the time of filming, but it's Meryl Streep who looks impossibly young in this one.