Xia is a little mermaid who was abducted and raised in a human world far away from her ethnic group; He is an archangel, but was seriously injured during a mission and had to be captured by humans in the form of a girl.
Both of them were kidnapped into the famous Gold-selling Cave of the Universe and became one of the most precious goods here.
The two have been eager to escape from here until a real opportunity is presented to them. You can only gamble with your life. If you succeed, you will be free. If you fail, you will die.
Mission: Freedom is priceless
