It is said that long ago the world was devastated by toxic air, leaving survivors trapped but thriving in a sealed community underground. In this society, knowledge is a guarded commodity, and truth is highly valued. However, after an encounter with people on the outside, a young girl decided she wants to leave the safety of the underground community and see what's on the outside. Confusion and fear accompany her as she journeys from her home for the first time, and she encounters a man with neither memory nor identity. Together, their world begins to expand as they meet new people and experience new things. Reality becomes blurred with creation as they begin to question what is and what is not.