At the age of eight, Katsa learned that she had a special talent -- or "Grace" -- for killing. Since then, her uncle, King Randa, has exploited that talent by using Katsa, now in her late teens, to punish people at his whim. Despising her Grace, Katsa forms the Council, whose secret mission is to right injustices inflicted by the kings of the seven kingdoms. On one of these missions, Katsa meets Prince Po, and the two form an unlikely alliance to uncover the truth about his grandfather's kidnapping.