As the gang gets ready for Robin and Barney’s wedding, Ted invites Lily to see the house he has finished fixing up; an obnoxious couple ruins Barney and Robin’s night of relaxation; Marshall takes the baby to Minnesota for a family visit.
Robin would like Barney to sell his bachelor pad so they can get a place of their own, but he is somewhat reluctant and goes to great lengths to sabotage any potential sale. Meanwhile, Lily’s art-consultant position with the Captain impacts her relationship her husband.
Barney discovers a lost episode of a behind-the-music show that features Canadian teen singing sensation Robin Sparkles (aka Robin), and includes a new video and another intriguing revelation from her past. Meanwhile, Marshall and Lily suspect that Ted’s new girlfriend is a stalker.