Clouds Over Ravenslea takes place in 1930's Devonshire England. After serving in the 1914-18 War Captain James Thorncroft returns to Ravenslea virtually unscathed by his horrific experiences. He is now married to Catherine; they have three children Eden Rebecca and Luke. Once the family are together again everything appears idyllic but as the summer of 1930 draws to a close danger threatens the Thorncrofts that could destroy them as well as the beautiful mansion itself.