After defeating Mister Freeze in the GCPD building, you will be given a side mission to find his wife, Nora Fries, in Batman Arkham City. This mission is known as Heart of Ice, in which a frozen Nora Fries is kidnapped and held captive somewhere near the Industrial District. With massive locked warehouses in this area, Freeze's wife could be anywhere. Even with the resources available in Batman's Utility Belt, finding Nora will be a challenge.
Batman: Arkham City – Heart of Ice (Nora Fries) – Side mission walkthrough
All you need is some good information on the location of Nora Fries in Arkham City. While Batman may be hesitant to accept help, I think you can make an exception. Here’s where and how to find the location where Nora is being held captive.
After you receive the quest, you will be able to hear Mister Freeze's voice note on the map. The voice note reveals that Nora Fries is located in one of the buildings (or warehouses) in the Industrial District. So if you're okay with that, we've marked Nora's location in the image above.
Once you reach the building indicated above, you will see a locked door. Since there is no way to unlock that door, you will have to find another way. For that, you can follow our instructions below:
