John Constantine is walking through the cold London streets.
John exercises his friend Gary Lester to kill a bug demon but he died during the process
John decides to go to the U.S. to see his old friend Swamp Thing
In the U.S lots of craziness happened that interupted his original reason for being in the states from demon yuppies to war vets with severe P.T.S.D.
Yet another interruption happened John was in an accident and and woke up in the hospital to fin a demon named Nergal standing in front of him instead of killing him the demon gives John some of its blood to heal him.
John finally arrives to the Louisiana swamp to check up on his friend Swamp Thing since John is it's protector.