The story begins in modern-day London, where we are introduced to Wendy. Her granddaughter is kidnapped by a mysterious and terrifying woman known only as Angel. Next, we travel back into Angel's past. We see how she grew up in the idyllic English countryside. First we follow her life as a teenager in 1991, then as a toddler in 1979. We discover that Wendy has known her all along. In the end, it turns out that Wendy herself is consumed with guilt...