In AD 2242, "New Arc City" was famous for its absolute rationality and order. Every citizen here must undergo "emotional stripping surgery" at birth to remove all strong emotions that may cause chaos-sadness, anger, ecstasy, fear. As a result, society has become efficient and stable, but it is also like a glass of ice-cold water, without any ripples.
Ling Che is the ace of the Order Maintenance Bureau. He has a secret ability called his "seventh sense" that allows him to smell the reverberations left behind when emotions are leaked. With this ability, he has repeatedly solved cases related to the "emotional black market". However, a bizarre death completely shattered his frozen world. A senior engineer died of cardiac arrest in his fully enclosed apartment due to "extreme grief" - something that would never happen in New Arc City.
There were no traces of intrusion at the crime scene. The only clue was the suffocating sad reverberation that Ling Che could smell, like an invisible ghost. Following this sad clue, Ling Che's investigation pointed to the forgotten corner of the city - the old district, and the mysterious woman named Ye'an.
She is the only original emotional entity in the city and the biggest suspect in this "emotional terrorist attack".
