Arcane hosts a science conference, but it is crashed by a professional hit man who used to work for Sunderland and now has a score to settle. The Swamp Thing discovers the identity of the hit man and has a score to settle of his own.

Arcane's experiment to bring out the inner beast in a human being works a little too well. He goes on a rampage and his assistants will suffer the cost as they, along with the Swamp Thing, search the swamp to stop him.

Arcane is convinced that Carter LaRoche is attacking him in the night, but LaRoche is locked up in an insane asylum, and he is getting pretty friendly with Will.