Ted, Marshall, Lily, and Barney find out that Robin never goes to malls and refuses to explain why. Marshall posits that Robin was married in a mall in Canada, because whenever asked about Canada, Robin only talks about her friend who got married way too young. Barney, however, believes that the secret is related to pornography. They agree to a slap bet, where the winner of the bet slaps the loser as hard as he can, and appoint Lily as the slap bet commissioner. Barney then starts working his way through hours of Canadian porn, which he finds both depressing and tedious.