Lost in the Sun is a coming-of-age story about Dawn, a Napa Valley teen fresh off her high school graduation and about to set out for college. Days from starting her new life away from her rural upbringing, she gets an odd text from her estranged sister, who stole from the family years before and vanished into San Francisco. Not ready to write her older sister off, Dawn sets out for San Francisco, determined to bring her sister back from exile and the family back together again. But in a city bigger, stranger than anything she's ever experienced, she finds something beyond her sheltered imagination: her sister is involved with a cult of sungazers who've found a darker side to the sun, and intend to use it.