Arches is a standalone story that takes place after the events of Echo.
A couple visit Echo to do some paranormal investigating, the town now abandoned five years after the mass hysteria. Despite this, something evil still lurks in the town, evil enough that it's kept the horrors alive.

During spring break, Chase, a young otter who grew up in Echo, is back for a school project aimed at documenting an event in the 1870's that may have lead to the town's current state. He's joined by five friends, who grew up with him in Echo, taking the chance to have a little reunion. Unfortunately, Chase begins to realize that their memories of Echo may have been a bit rose-tinted. Being back in the town digs up old and painful memories; secrets that lead to rifts in the group that have been boiling under the surface for years.

Things have changed quite a bit on Adastra. The Human's arrival has altered the political course of the entire galaxy. After his departure, the friends he knew on the wolven moon are left guessing as to what needs to be done next. The Parents, the supposedly all-knowing, all-powerful beings controlling the Galaxias, have a plan, but it's not like they're being upfront about it. They never are, and Scipio, a young wolf on a diplomatic mission, starts to wonder if these Parents...