As Kat Valdez prepares for her live, on-stage wedding, she finds out about her husband-to-be's infidelity. In a heartbroken moment of spontaneity, Kat singles out Charlie, a stranger in the crowd, and offers to marry him instead. Now, they must navigate the public spotlight together and find out if this marriage can actually work. Bobby Crosby's webcomic of the same name inspires the unconventional love story.