Issue Detective 589
Subtitle The Burning Pit 
For the Love of Ivy
Date August 1988
Writer(s) John Wagner, Alan Grant 
Lewis Klahr, Steve Piersall
Artist(s) Norm Breyfogle 
Dean Haspiel, Denis Rodier
storyline Kadaver attempted to extort Phil Hobart, who'd come by to pay for the hit. Hobart was nephew to the deceased, Dalton "California" Walls, a former millionaire who decided to live on the streets as a bum. Batman arrived at Kadaver's with the killer; Mitchel showed up shortly thereafter. He was forced into a pit of quicklime that Kadaver had threatened Hobart with. The quicklime seemed to neutralize the "Corrosive Man." Batman left the four men there for the police. 
Batman happened upon a dying man with ties to Poison Ivy. After seeing Ivy and going to her doctor, he learned that she was dying - the immunities that made her almost involnerable were breaking down. He was able to get to her and convince her of what was going on. The doctor assured them she'd have a complete recovery in time.