Caelyn is the younger sister of YouTuber, Connor Franta. When Caelyn gets tired of Minnesota, she goes to spend the summer in LA with Connor and his roommates, Kian Lawley, JC Caylen and Ricky Dillon, along with Sam Pottorff and Trevor Moran. But, what happens when Caelyn and Trevor get a little too close for Connor's liking? Will this be the best summer of her life, or will it end in disaster?