A young woman engaged to be married finds her life changed forever when she meets her best friend's girlfriend.

With Britain battered by a storm, one last plane takes off. Shortly after, passengers start disappearing one by one. Those that remain frantically try to discover who - or what - is behind it before they share the same fate.

A successful Wall Street trader returns to England with her new husband and five-year-old son, but their new start together turns into a nightmare when they move into a country house which contains a terrible secret.