<P> Future Ted then pauses the story to tell its moral, stressing its importance: "Don't ever invite an ex to your wedding ." </P> <P> Meanwhile, in 2008, Robin is in Japan . She does not like her job as it is not at all serious: she has a chimpanzee co-host, for instance . Ted calls her and invites her to his wedding; she agrees to come . At the bar, Barney is being unusually supportive of Ted's marriage . He explains to Lily that he thinks it is a good opportunity to hook up with Robin . </P> <P> The day before the wedding the group make a trip to Shelter Island, only to find the venue is a Yoga resort, where the bar has a no - alcohol policy, and the all - inclusive meals are 100% vegan . They are all very disappointed, and appear frightened by the bartender, who they think is a former member of The Spin Doctors (although he isn't). Stella finds out Robin has been invited to the wedding and tells Ted she doesn't want his ex at the wedding . Although he disagrees, Lily sides with Stella . Barney calls Robin but hesitates on telling her due to his plan and tells the others she is already on the plane . </P> <P> A few minutes later, Stella tells Ted that Tony is refusing to bring her daughter Lucy to the wedding . Ted decides to go convince Tony to allow Lucy to come to the wedding . Barney meets Stella's sister, and she wants to do "dirty, depraved" things to him . Barney tries to resist, thinking of Robin . </P>

How i met your mother shelter island song