Dave Koster thinks he has a slam dunk case against drunken vagrant Samuel Chaplin who is arrested for burglary and assaulting police officer Dutka. Although Chaplin admits to hitting Dutka, he swears he didn't commit a burglary. Tenacious legal aid attorney Martin Jameson thinks that Koster's case isn't as strong as he believes and doggedly pursues proof of Chapin's innocence.—Skip Eastport