Both the Justice League teams are trying to prevent the spread of a disease which has turned swarms of villagers into zombies. As they prepare the meet the villagers, a gas canister explodes, exposes U.N. troops to the disease. The League is forced to retreat. Simon Stagg then arrives. He explains that the gas was created by one of his former employees, Dr. Irwin Teasdale. The villagers are marching toward one of Stagg's chemical plants at Teasdale's direction. Despite their misgivings about Stagg, the League agrees to help defend the plant.
