After a string of foster homes and the death of her heroin-addict mother, Lexi Baill is taken in by a newly discovered great-aunt who lives a spartan life near Seattle. Lexi soon meets Mia and her loving twin brother, Zach. The friendship flourishes, and Mia's mother draws Lexi into the family circle. A slowly growing attraction between Zach and Lexi begins, but then Lexi, Mia, and Zach collectively make a bad decision that results in a tragedy with extreme repercussions.