This third volume is mainly full of flashbacks tracking Andy's, Tim's, Effie's, Tesla's and Driller's backgrounds and origins and leading in each case up to “present-day” events as robots and scrappers clash. This volume does not have a lot of progress in the general plot but deals with these individuals.
The characters are developed well and makes the whole experience enjoyable. The artwork can be frustrating some times but is generally work a look. Worth a look, especially if you've read the two previous volumes.