Spoiler Alert!!!!!!!!!
After 14 months of being in the sewer the group finally escapes with the liberation of their city, Lvov. With the help of their beloved sewer worker/friend, Leopold Socha, they are able to start a new life. Some of the members of the group move away to different areas of Poland and some even move out of Poland into other countries, including Germany. One day the Chiger family is on a train and they decide to stop by to see if Socha is doing well and prospering with his family of 3. When they arrive they soon learn that Socha had been killed by a semi truck while riding bikes with his daughter. On the bright side they learn that because of their payments to Socha while they were underground, Mrs. Socha and her daughter are now very well off.
Citations
http://archive.adl.org/children_holocaust/story_krystyna.asp