Poison Ivy escapes Arkham Asylum and heads for a ""Save the Rainforest"" benefit--where she decides to take a few hostages. Hostages that include Robin's father, Jack Drake!
When Poison Ivy learns that a Rain Forest Fund Raiser is being held in Gotham City, she breaks out of Arkham Asylum. Bruce Wayne, meanwhile, meets Jack and Dana Drake (parents of Tim Drake) at the Gotham City Rain Forest Fundraiser. Jack and Dana are sharing a cell phone call with Tim when Poison Ivy crashes the fund raiser.
Ivy describes how outrageously backward the party is since the products used at the fundraiser represent the killing of trees. Ivy orders her plants into action and takes hostages.
Tim Drake hears what is happening at the fundraiser, changes into his alter ego, Robin, and rushes to the scene. Robin negotiates with Ivy about her problem with uncaring industrialists who make contracts for Rain Forest deforestation while attending that fundraiser. Ivy decides not to use her toxins on Robin, giving Batman time to overpower Ivy.