In the future city "Xinhai" where memories can be retrieved, traded and erased, a man code-named "Zero" woke up in a clinic with a blank past. His only clue is an ancient compass whose hands are always spinning out of order. In order to recover his identity, he turned to Xian, the most prestigious but also most dangerous memory tuner in the city. Xian is known for his calm precision, his ability to tune out truth from the most chaotic reverberations of consciousness. When she touched the compass, she discovered that the stripped memory of "Zero" was far from a simple transaction, and behind it was a dark secret that could subvert the order of the entire city. The two form a fragile alliance and embark on a dangerous voyage between the island of memory and the sea of oblivion.
