A hot architecture nerd! Barney: Whose dream? I want to get involved with "Save The Arcadian." It's about the building. Robin: Wow, that is weird. Wait for it. What if my design could incorporate The Arcadian's facade into the new GNB headquarters? Who's the girl? [END OF FLASHBACK]
Ted: Yeah, it was about the girl.
Plan: A: a hot girl; Q: What does Ted meet? A: the landmark building; Q: What is being torn down to make room for the new GNB headquarters? Summary: Ted becomes conflicted about pursuing his dream job of designing the new GNB headquarters after meeting a hot girl who's passionate about saving the landmark building that is being torn down to make room for it.