(Part two of the DS9/TNG crossover.)
The crew of the U.S.S. Enterprise D and Deep Space Nine (DS9) send an away mission led by William Riker into the wormhole to rescue some missing officers only to run into an invading armada. Back at the station DS9 is infiltrated by Cardassians who turn out to be more than they appear. Meanwhile the children of both crews are having fun and getting into a little mischief.
The next issue in this ark is issue two of this volume but it is the third chapter in the arc. The whole story arc takes place before Ro Laren betrays the Enterprise and just after the Federation sends Benjamin Sisko to DS9. These were made while the shows were still going.