Robin and Barney face the aftermath of their hook up, and are filled with incredible guilt because they are both in relationships with other people. The four all end up together on a work cruise and the tension mounts. Barney laments that maybe this is Robin and his chance to rekindle their relationship, because he still has feelings for her, but Robin is hesitant. Although Barney tells Nora the truth, Kevin stops Robin before she can confess and says that he loves her—leaving Barney completely heartbroken. Ted, Marshall, and Lily attend Groovapalooza, a music festival featuring nineties hippie bands. Ted and Marshall smoke pot, despite Lily's insistence that Marshall needs to be responsible as a future father. Ted and Marshall's quest to buy nachos for Lily becomes a metaphor for lost time and anxiety about the future.