In a future where technology can seal memories in "optical cores," former engineer Shen Yu becomes the guardian of a remote memory lighthouse. He maintains countless strange memories day after day, just to protect one core - the perfect memory of his late daughter Xingchen. When Ling, a censor from the "Administration Bureau", suddenly landed on the island and claimed that Xingchen's memory was "contaminated" and must be formatted, Shenyu's solid world began to collapse. He is forced to make a choice between maintaining false happiness and facing the cruel truth. This choice is not only related to his personal salvation, but also affects the ultimate definition of memory and human nature.
