Rob Cole, a doctor from Persia, arrives in England with his own child after the tragic death of his wife. Finding himself among those denied entry into London because of municipal ordinances, he establishes a healing house for the needy beyond the gates, demonstrating his exceptional skill in healing. This attracts the attention of the king, who immediately summons him to treat his daughter. At the very heart of power, he faces trials where the right to save lives must be defended not only with knowledge but also with courage.