MacBarm is bringing his chickens a new trough full of feed, that is until it falls out of his truck and breaks. The Mechas need to help him find a new container for the chicken feed, and fast, as the chickens are getting hungry. / Grandma and her twin sister return to Treetop Woods to recreate their old zipline act, but quickly discover that the zipline no longer exists! The Mechas must measure and build a new zipline so the Zipline Sisters can ride again.