"A Long Way Home," tomorrow night's ABC movie, attempts to set new minimums in TV storytelling. The story is this: An adopted young man attempts to find the brother and sister from whom he was separated nine years earlier. And he does. They all hug and that's that.

Woefully and flagrantly bereft of narrative dimension or stylistic ingenuity, the film, at 9 on Channel 7, relies instead on bursts of spurious melodrama and another quivering-lipped performance from Timothy Hutton, the star of "Ordinary People." The sensitivity shtick that served him so well in "People" gets an enervated replay here; he proves to be a void within a void.

The laughably primitive script by Dennis Nemec gets a suitably numbing treatment from director Robert Markowitz, starting with a preposterous prefatory scene in which a social worker who looks like G. Gordon Liddy yanks the siblings apart and takes off down the street with two of them in the car while the other one chases them in his pj's.

Enter basso profundo Brenda Vaccaro as a social worker who takes pity on the tot left behind when he returns later as a young man, looking not so much obsessed as wondering where he left his car keys. Inept tearjerkers like this make the usual pandering TV smarm look, if not good, at least less sanctimoniously dishonest. Not surprisingly, the film is from Alan "That's Incredible" Landsburg Productions. It's abominable.