The Legionnaires arrive in the present day in Red Lake Falls, Minnesota in pursuit of a bad guy named Alastor, who has brought some kind of unspecified plague into the past. Alastor, apparently some variant of shape-shifter, turns into a monster and threatens the town, until he is stopped by a little girl who reminds him of his dead sister.
With flight rings disabled and transuits malfunctioning, the Legionnaires struggle to repair their damaged time bubble. Tyroc retrieves Alastor and they take him onto the bubble, intending to return to the 31st century. But alas, the time bubble is destroyed. When the smoke clears, Alastor is gone. Gates and Yera are also both missing, with no trace except "organic residue" falling with the rain. And the Legion is stranded in the past.
This story starts in the middle of things, a technique that litcrit types call in medias res. It can be done well -- witness the Universo Project storyline in LSH 32-35 (1987/03-06) -- but it can also be done sloppily. Only the future will tell, but at this point...it feels sloppy. We'll see.