A serial killer brutally slays and dismembers several gay men in New York's S&M and leather districts. The young police officer Steve Burns is sent undercover onto the streets as decoy for the murderer. Working almost completely isolated from his department, he has to learn and practice the complex rules and signals of this little society. While barely seeing his girlfriend Nancy anymore, the work starts changing him.

A fat Lawyer finds himself growing "Thinner" when an old gypsy man places a hex on him. Now the lawyer must call upon his friends in organized crime to help him persuade the gypsy to lift the curse. Time is running out for the desperate lawyer as he draws closer to his own death, and grows ever thinner.