Brian's just a normal guy until he meets Elmer, a foul, slimy, phallic-shaped creature who can live in a hole in the back of your neck and make everything seem really groovy, like you strayed from a '60s acid movie. Basically he feeds you an addictive narcotic, which you rather like, in exchange for your help in obtaining his food, human brains. Disquieting black humour!! Disgusting!!