Ambitious and dour alternate reality drama adapted from the Kazuo Ishiguro novel. Kathy, Tommy, and Ruth grow up in an isolated British boarding school where it's quickly known that they are cloned children raised for the sole purpose of organ donation. They are shown at three different stages in their lives (beginning in 1978) with a romantic triangle developing between the young adult Kathy (Mulligan), Tommy (Garfield), and Ruth (Knightley).