All the couples are back for a vacation in viva Las Vegas. Where the old saying goes, "What happens in Vegas...stays in Vegas." One of the lucky couples from the last film is getting married, so each of them split off into gender groups. Each gender determined to have the time of their lives before the big wedding. However, things go haywire, as this may turn out to be one vacation they may not soon forget.

Loosely based on the popular board game by Hasbro. Aliens invade the Earth, and try to wipe out the human race from existence. Putting up a secluded dome around our military naval unit, it's up to our brave men and soldiers to save the day from this alien menace. Also one of them has to work up the never to ask his superior officer for permission to marry his daughter. Oh gee, I wonder how this one will turn...