A woman named Red decides to disappear. She leaves behind only a single recorded letter, and scattered files, traces, and memories. Years later, investigator Alpha attempts to piece together her entirety from the scattered data, only to unearth increasingly inexplicable blanks. Meanwhile, a strange woman is trapped alone in a room, her body undergoing indescribable changes—like a lizard, like a peeled mango skin. Two people still immersed in intimacy draw closer and tear at each other day after day. Red left no answers, but the traces she left are silently changing those in the world she never met.