The night of the walker ambush on Hershel's farm was the beginning of the end for the survivors that remained. Torn from their sanctuary, the group was forced to survive on the road, moving from place to place in an attempt to find safe shelter. It was during a last stroll along a dirt road that they discovered the prison. A building that, in the past, kept people trapped inside could possibly be the haven they were looking for. The group worked tirelessly to clear the place of walkers and unwelcomed guests. In the end the prison was theirs.