 The young architect Walter (Rob Lowe) leaves his wife Linda to go to L.A. to draw a mansion for Harrison (James Belushi). On the highway a truckdriver almost drives him off the road. Walter calls the truck-company to complain. The driver gets fired. When Walter arrives to the apartment-block where he has rented a flat he meets the choleric landlord William (Dean Stockwell) and the others living there. But now the problems starts. The next morning somebody has ruined his drawing and Harrison dislikes what Walter has drawn. But soon everything gets out of hand. Walter gets into more trouble - one morning he finds rats all over his apartment and the next day he finds his beautiful neighbour killed in his bed - and he starts to think that it is the fired truckdriver who is out to get revenge.