In the "Mirror City" where skyscrapers stand like mirrors, a technology called "Echo" can extract the remaining memories from the brains of the deceased. Former top "echo master" Lu Chen retired due to a personal tragedy, but was dragged back to the center of the whirlpool by a bizarre murder. Gao Yuan, the father of "Echo" technology, was killed, and his daughter Su Wan came to the door with a lot of money, forcing him to sneak into her father's broken memory. When Lu Chen pursues the truth, he not only has to face distorted memory fragments and lies about reality, but also faces his own deeply buried nightmare. In the Mirror City, everyone has a reflection, and the most dangerous one is the one who cannot even recognize himself.
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