Barney: It's for the bride. Barney: Yeah. Learned that in a day. Ted (2030): And the day arrives for Lily and Marshall's very big indoor wedding... with a harp.
Plan: A: Marshall's wedding day; Q: What day does Lily and Marshall have? A: Barney; Q: Who steps in to save Lily and Marshall's wedding? Summary: Lily and Marshall's wedding day arrives, but nothing goes as they had planned. Surprisingly, Barney steps in to save their once-in-a-lifetime moment. Meanwhile, Barney abuses the 'it's for the bride' superpower.