Baldwin IV took the throne of the Crusader Kingdom of Jerusalem in the 12th century already showing the first signs of leprosy, and this film follows how a boy diagnosed with an incurable disease ended up leading armies against Saladin. The kingdom itself is treated as the real subject: a small European transplant surrounded by hostile territory, dependent on shaky alliances and constant reinforcement from Europe, always a few bad harvests or one lost battle from collapse. The film traces how Baldwin's illness shaped succession politics at court, with nobles maneuvering over who would inherit a throne its own occupant could not physically hold much longer. Rather than treating the leper king as a footnote, it uses his reign as a lens on the kingdom's underlying fragility, showing a state that kept functioning, and fighting, even as its king's body failed him.