Ingrid Vaughan finds herself obliged to move her son Michael, who is in an irreversible coma after an accident, to a mysterious institution where  terminal patients are looked afteruntil their final hour. At the same time, Thomas Kehl is following the trail of his grandfather who disappeared during the First World War. His investigations lead him to a manuscript kept in the Munich library. Both stories will converge in the Contessa Von Rosenthal's mansion, an eery place where events will lead the protagonists to discover some terrifying truths.