Cass Howard is sick of being single. All her friends are in these cute, perfect relationships with mega hot guys, while Cass is at home writing fan-fics about relationships with fictional beings and celebrities who will never learn of her existence. The dreaded Valentine's Day is dawning, and Cass decides to put an end to her single life, by asking her crush out. After being turned down by her crush, Cass turns to a popular dating site, and finds herself on the site's Doomed Dates, a problems page. Deciding she has nothing better to do, Cass responds to some of the problems of users under the name of Mrs Valentine. Little does Cass know that her role as Mrs Valentine is about to take off on a viral scale.