Once Johnny and Pawter are awake from their "happy" stupor, the team decides that if they’re going to save Old Town from utter destruction, they’re going to have to infiltrate Spring Hill. And then spring out.
After successfully breaking into Spring Hill’s back-end, Pawter is able to turn off the mind control and address Old Town directly. She spills the beans on the Company’s grand plan, and encourages them to take down the wall themselves.
Delle Seyah surrenders to Pawter’s demands to cease wall building in other towns. Apparently, no building contractor would take part in a construction project that hundreds of people just killed themselves against.