Marcus/Marsha, an 18 year old transsexual, can see no other future than street-walking in the footsteps of his prostitute mother when he meets a fantastic bisexual teenager called Gavin. Gavin moves in, becomes the lover of both mother and son/daughter and re-arranges their lives at least temporarily for the maximum convenience of all three. Things can't last and when Gavin decrees a ban on sex-for-cash all three are caught up in a desperate pursuit...