Marshall and Lily are about to get married, however, nothing seems to be going right for either of them. Much to Lily's disgust, Scooter, her high school boyfriend, shows up at the wedding having been invited by Lily's family (even though Lily did not invite him personally), and then tries desperately but unsuccessfully to win her back. Lily also has no flowers for the ceremony, her photographer tackled and replaced with a camera phone, and her harp player is in labor and about to deliver a baby. To top things off, Lily's veil was found ruined, and Lily thinks that the wedding is just falling apart.
Marshall is also having a difficult time, as Lily's cousin Amy (Candice Accola) gave him highlighted tips in his hair, and in an attempt to correct it, he shaves off a patch of hair on his head. Marshall and Lily then see each other, and they are about ready to call off the wedding. However, Ted has a plan. Since both Marshall and Lily always wanted a small wedding in a park, Ted suggests since they are outside, hold a small ceremony like they always wanted, and then go perform the ceremony in front of all of their guests. With Barney recently licensed to marry people, all they need is something to cover Marshall's bald patch, which comes in the form of a fedora, borrowed from one of the groundskeepers of the Van Smoot House.
Marshall and Lily are married by Barney, in front of only Ted and Robin. Then, without a worry about how the big ceremony takes place, they go inside, and hold the wedding ceremony in front of the family and all other friends. However, no one else knows that Marshall and Lily had been married right before. They hold the wedding reception, which carries over into "Something Blue".