Never Let Me Go (2010)

A dark and sophisticated slow-burning drama, Never Let Me Go is adapted from the highly acclaimed novel of the same name by Japanese-born British author Kazuo Ishiguro. It stars Carey Mulligan, Keira Knightley, and Andrew Garfield as boarding school raised teenagers eager to explore the outside world when they learn a secret that will threaten their very existence. Anything more is a spoiler, watch it.