Mike and Costa were once like brothers. Now Mike is a policeman and tries to convict his former friend. But on this day, a chemical accident in a factory not far away ensures that the two have to overcome quite different problems. The accident victims mutate into ravenous zombies and the two are already facing a new enemy. A leg-breaking fight for survival breaks out.

Costa wakes up tied up in the basement. Apparently, someone still has old scores to settle with him...