After travelling to England at the request of a mysterious patron, Maggie Walsh (Katharine Ross) and her boyfriend Pete (Sam Elliott) are involved in an accident. They're invited to recuperate at a huge country mansion, but they are not the only guests. Five others have gathered, some of the most powerful people in the world. Soon they will start dying, killed by an unknown power. An ancient evil is stirring and Maggie will uncover a dreadful truth.