In a future city where memories can be extracted, stored and traded, Lin Ci, the memory appraiser of "Tochuan Hall", has the rare talent of touching and interpreting other people's memories. Day after day, he evaluates the value of memories for clients, but he cannot fill the gap in his own childhood. A mysterious commission broke his peaceful life: a powerful man brought a broken memory fragment, which contained only a burning lighthouse and a vague girl's back. When Lin Ci discovered that the melody in the fragment overlapped with the melody in his nightmare, he realized that this was not only a business deal, but also the only clue to finding his identity. He will embark on a dangerous journey deep into the labyrinth of memory and uncover a huge conspiracy that has been forgotten.
