Katherine "Kat" Chapman is the youngest of the Chapman siblings. Much like her older brother Jim, Kat is a YouTuber. Kat keeps herself busy with making quality content for her main channel, KeepingUpWithKat and her vlog channel, KeepingUpWithTheChapmans. As a YouTuber, Kat meets many incredible fellow YouTubers and becomes friends with them. Will she accidentally fall for one of her YouTube friends? Or will she fall in love with someone closer to her...