The only thing that Jude and his girlfriend Bobbie you may have in common is the depedenţa of heroin. The two spend their time trolling through Chicago, sleeping in the car and trying to get hold of cash to sustain addiction. Bobbie keeps all property in a metal lunch box. One day, Jude and Bobbie go together at the Zoo and realize that between them and the animals in the cage is not too much difference. When one of them is hospitalized, the two are forced to make a decision.