Dreamland delves into the tumultuous life of Caitlin, a sixteen-year-old grappling with the disappearance of her older sister. As she navigates this profound loss, Caitlin is drawn into a relationship with Rogerson Biscoe, a boy whose magnetic allure is undeniable but harbors a dangerous side. This association leads Caitlin into a semi-conscious state, where the boundaries between reality and illusion blur, making her everyday life seem distant and unimportant.

The novel explores themes of love, danger, and self-discovery, presenting a compelling narrative that captures the complexity of relationships and the challenging journey towards understanding oneself and one's desires. Sarah Dessen's skillful storytelling invites readers to reflect on the impact of relationships and the difficult choices one must make in the pursuit of happiness and self-identity.