A fake priest and a prostitute conspired to plan a scam to extract money from church donations... Not realizing that a true miracle would befall them would completely change their lives. When Martin (played by Manalo), a former criminal, appeared as Father Eman, the town accepted him. But later on, he fell in love with the town prostitute Lorena (played by Mina) and revealed his true identity to her. They planned a plan together to win the trust of the people; Sale; Their Miracle. But Lorena's insane sister Joan (played by Taylor) witnessed the appearance of the Virgin Mary, a true miracle that will challenge their faith and forever change their lives.
故事背景为存在「外」、「内」两个国家的世界，人类少女「汐华」与非人的异形「老师」共同生活，一段宛如绘本、童话与诗集的黑暗奇幻物语。 长篇动画附属于《外之国的少女》番外篇特装版。
