In the new Kyoto of the future, human technology can strip emotions from consciousness and transform them into an entity called "heart crystal" for storage, trading and even artistic creation. However, this technology has also given rise to an unprecedented crime - emotional theft.
Kai Lan is a top profiler in the "Emotional Crime Response Bureau". His own emotional spectrum is extremely flat, which allows him to analyze the most chaotic emotional crime scenes with absolute rationality. When Laila, the city's most famous emotional artist, fell into a deep coma, and the core of all her emotions - a perfect heart crystal named "Agape", which represented the supreme love, was stolen, the whole city was shocked.
No physical traces were left at the scene, the only clues being the faint emotional echoes that lingered in the air. In order to pursue the truth, Kailan decided to use a forbidden method: "deep resonance" between his consciousness and the echo of the stolen heart crystal. He will no longer be a spectator of the case, but a witness of Laila's memory.
However, what he dives into is not a linear memory tape, but a maze composed of the most powerful emotional fragments of Lila's life. From the pure joy of seeing the morning light in childhood, to the loneliness and bitterness of creative bottlenecks, to the blazing love in a celebration... Kailan must piece together the clues of the thief in these chaotic, broken, and highly contagious emotional storms, while resisting the erosion of his own consciousness by these emotions that do not belong to him.
