Midwinter Of The Spirit follows country vicar Merrily Watkins, who just happens to be one of the few women priests working as an exorcist. When a man is found murdered by crucifixion, the police, aware of her knowledge of the paranormal underworld, turn to the Vicar for assistance. Before long Merilly is convinced Satanists are behind the crime and the investigation takes them into a very dark and dangerous world.
Priest and trainee exorcist Merrily Watkins is asked for help by police in solving a baffling and gruesome murder. She quickly becomes embroiled in a terrifying mystery and finds herself in real danger.
Merrily is on a quest for answers after a murder, a desecrated church and a clergyman's apparent 'suicide'. She suspects a Satanic group may be at work, and is guided through a ceremony of lesser exorcism by Huw Owen, but nothing can prepare her for what she is about to uncover.
Exhausted by her own demons, battling anyone else's is the last thing Merrily wants to do. However, she must gather her wits and take strength from her mentor Huw Owen as she puts the final pieces of the jigsaw into place. As the investigation reaches its conclusion, Merrily realises she needs to steel herself and summon the energy to fight evil in order to save her daughter's soul.