serum be about a crazy doctor that find a serum that be suppose to cure all disease through the power of the mind . instead it create some kind of monster that need to eat human flesh and brain . the mad doc create some zombie out of cadaver and have some problem . there be a very long lead into all the action with many scene get you acquaint with the character . the mad doctor nephew get into a car accident and the mad doc try to use his new serum on the boy . the result be not good . this be a class c film with ok act but some trouble direct and some continuity error . there isn not much zombie action in this one and the effect and while adequate and be nothing special . you can fast forward through the slow part and get some enjoyment out of the action scene . watch out for some nudity and bad language .