To Kill a King is a fast-paced and emotional costume drama set in 17th-century England near the end of and several years after the English Civil War's first cease fire. Together, historical figures Lord General Thomas Fairfax and his faithful but fierce deputy, Oliver Cromwell, defeat the King of England, Charles I, who is promptly dethroned and imprisoned. This story unfolds as the relationship between general and deputy continues to play out after the battles on the field are long over.
England lies in ruins and destruction after years of civil war, but Fairfax's world is brightened when he is reunited with his love and wife- Lady Anne. He has dreams of rebuilding England with compassion, but these ideal images are shaken as his war-time deputy and one-time partner expresses more sinister plans. The political climate is tense and personal relationships are strained as England and these two friends and leaders struggle to find their own as well as the country's way in the wake of so much carnage.