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.

A security guard named Ben falls in love with a beautiful girl named Angela. They seem like the perfect couple, as he plans to propose to her soon. However, there's only one problem...he has to get her brother's blessing first. Sadly, her brother, James, is not exactly a big fan of Ben so in order to prove himself worthy of Angela, Ben agrees to go on a 24 hour ride along police patrol across Atlanta.