Batman Vol.1 #568
Batman and Robin entered the secret Batcave built by Bruce under Robinson Park and found Poison Ivy and some kids trapped in solid clay. Robin freed the kids and Batman questioned Ivy about what happened. She explained how she found his cave under the park and how she destroyed most of it, except for a box that she knew must be important for Batman. She told Batman to help her and free her from Clayface's trap and she would return him the box. Batman reluctanctly agreed and told Robin to take the kids to the outside where they would be safe while he stayed and tried to free Ivy.
Estimated Condition: VF/NM