The gang works together to plan a legendary bachelor party for Barney.

With only a half an hour left before the wedding, Robin and Barney panic; Lily and Marshall rewrite their wedding vows.

When Gary Blauman shows up at the wedding, it sends the gang into a frenzy as they each recall an encounter with him.

Marshall asks Barney and Ted for help figuring out where Lily went in the middle of the night during their argument.

Barney concocts a plan when his father arrives at the hotel; Ted thinks he is being framed when a wedding-related duty gets messed up.

Barney is upset after Robin wins James’s wedding ring during the poker game, and Ted argues with Marshall and Lily over whether he gave them a wedding gift.

While Barney works through his anger at Ted after finding out he still has feelings for Robin, Marshall Skypes in to act as a judge and help settle their dispute….