In Xinhai City, memories can be retrieved, stored and repaired. Gu Chuan is the most famous memory restorer in the city. He can sneak into other people's broken memory crystals and sew up the broken time. However, he could not repair the incomplete dream about the deep sea and whale songs that repeatedly appeared in his mind. A mysterious commission broke his peaceful life: a powerful man brought a severely damaged memory crystal that belonged to his dead wife. When Gu Chuan sneaked into the isolated island of memory torn by violence, he discovered that this was not only a routine repair, but also a fatal pursuit. The whale song in his memory echoes the cry deep in the crystal. A secret that can subvert the order of the entire city is slowly surfacing with the tide of memory.
