In the perfect city "Mirror City" where memories can be edited and stored, top memory keeper Lin Xun is a loyal defender of order. However, a recurring memory fragment about the "non-existent sister" caused cracks in his flawless world. When he tried to pursue the truth, he found that traces of his sister's existence were being erased from the entire city and even everyone's memory by an invisible force. In order to retrieve the lost family ties and truth, Lin Xun embarked on a dangerous journey against the huge system and forgetting himself, uncovering the shocking secrets about human nature, memory and freedom under the glamorous surface of Mirror City.
