貧民街出身のゼノスは治癒師（ヒーラー）のライセンスを持たないまま冒険者をしていたが、さらに上を目指すパーティーのリーダーから貧民街出身は役立たずだからと金貨1枚だけ渡され、追放された。途方に暮れる中、街中で商人とのいざこざから重傷を負ったエルフの奴隷少女・リリを金貨で買い取り、治癒魔法で助けたことがきっかけで、治癒院を開くことを決める。ただし、その営業にはライセンスが必要であるため、あまり広まらないよう闇廃墟街の廃墟の屋敷にて開業する。
Life hasn't been kind to Zenos. He was born in the slums, and his dirt-poor background has denied him almost every opportunity. After an encounter with a healer, he throws himself into studying to become one and finally catches a break when an adventurer invites Zenos into his party. Zenos is thrilled—so thrilled, in fact, that he's willing to put up with his teammates treating him like garbage. They fail to appreciate his talents and ultimately kick him to the curb, claiming he's outlived his usefulness to them. Now bereft of money and out of options, Zenos decides to put his self-taught skills to use elsewhere and opens an underground clinic. Word quickly spreads about the brilliant healer working incredible magic in the city's shadowy underbelly. Even the royal palace is taking notice.
