Belly measures her life in summers, which are always spent at Cousins Beach with her mother, brother Steven, and her mother's best friend Susannah and her sons, Conrad and Jeremiah. It is a coming-of-age story about first love, first heartbreak, and the magical, complicated summers that shape her life as she finds herself caught in a love triangle between the two Fisher brothers. This particular summer, as Belly turns 16, everything feels different and she realizes this will be the summer she finally becomes pretty. The novel is the first in Jenny Han's popular trilogy.