Months deep into their continuing mission of exploration in the Delta Quadrant, USS Constellation has lost their north star.  The USS Grus has gone missing!

From Borg-occupied territory to the rare Wolf-Rayet star, from Chessu to the Krenim colony on Onitha, the scout ship Grus has charted a path for the crew of Constellation. Oh, all the wonders they’ve seen.

Constellation is pulled from a planetary survey of Buccarro IV by a distress call from the Grus, lost in an uncharted nebula.  Initially, the search pattern seems clear to Captain Taes, but triangulation within the nebula proves not enough.  Where the Grus has been lost, it can only be found in the labyrinth of Underspace.