A rat causes a chemical leak at a Papua New Guinea research facility, leading a group of eco-terrorists to demand the closure of all facilities. When a team of Interpol commandos are enlisted to eliminate the terrorists, they find themselves embroiled in a zombie outbreak.

When a terrorist's body, infected with a stolen chemical, is recovered by the US military, the corpse is cremated, unintentionally releasing a virus and bacteria into the atmosphere over a small island.