Lin Zhao wakes up with her memories wiped, and the world has erased the person she loved most, Shen Huai. His files are gone, security footage shows no trace of him, and even photographs fade yellow on their own. Yet every night, she dreams of a blue iris, its image etching an indelible pain into her mind. When the therapist Su Ling offers a recovery plan, black-market dealer Zhou Yu quietly slips her a bloodstained neural link, and AI nurse Yun Zhi whispers in her dreams, “He's still waiting for you to remember.” Meanwhile, rising council star Ji Wu is preparing to initiate the final purge. Before her memories are completely overwritten, Lin Zhao must pry open the truth locked away, even if the person she finds is no longer the one she thought she loved.
In her quest to find Shen Huai, Lin Zhao steps deeper into the dark networks of the Memory Federation, relying on AI Yun Zhi to analyze corrupted data, black-market dealer Zhou Yu to provide crucial memory fragments, and therapist Su Ling to cover for her. As she gradually recovers her past with Shen Huai, she uncovers a covert experiment in shared consciousness and a betrayal: he willingly underwent memory extraction to save her. She discovers that Shen Huai was no victim, but the mastermind behind the plan, all so she could survive by forgetting. Su Ling secretly activates a self-destruct program to blow up the Memory Core, at the cost of the eternal oblivion of every person whose memories were erased, including Lin Zhao. At the final hearing, Ji Wu presents records of Lin Zhao and Shen Huai's engagement, revealing that Ji Wu was the one who ordered the purge all those years ago. Lin Zhao must choose between saving Shen Huai, destroying the System, and helping Su Ling fulfill her plan. She chooses to upload her memories to Yun Zhi, making Shen Huai the new world's first “Memory Watchman.” She herself reboots as an ordinary person, never again remembering whom she once loved. But in the final image, an iris petal quietly blooms in the swaddling of a newborn baby.
