The story follows a Baltimore detective who is recruited into the Department of Military Sciences (DMS) and has to fight terrorists and flesh-eating zombies created by a pathogen called "Sword of the Faithful". Sword of the Faithful is a parasite that infects the brain with Prion protein. DMS is very short-handed because "Baker" team and "Charlie" Team were wiped out in an outbreak at a hospital, and the protagonist, Joe Ledger, is installed as the head of the new "Echo" Team. Meanwhile, a Middle East terrorist group led by El Mujahid is developing new, faster-acting strains of the disease. The funding for the new strains is coming from a pharmaceutical company called Gen2000.
When you have to kill the same terrorist twice in one week there's either something wrong with your world or something wrong with your skills... and there's nothing wrong with my skills.
Basically, there's an outbreak of zombies (called walkers most of the time) in plants. It all starts though in a warehouse... books