In the shadow of the city, there is an alley that swallows regret.
Chen Bo, an ordinary young man, accidentally entered a strange space called "Closed Loop Alley" on his way home on a rainy night. This is a place where objects, memories and sins abandoned by the world accumulate. Picking them up can give you a glimpse into the past and fulfill your wishes, but you also have to pay an unpredictable price.
His only ability is to "read" the strong emotions remaining on objects. A lipstick stained with tears that belonged to a girl he only met once, Xia Lan, became his only clue. In order to unravel the mystery of her disappearance and save himself, Chen Bo had to arduously pursue her among countless twisted rules and dangerous "reverberations".
However, every time he uses "resonance" to peek into the truth, it's like dancing on the tip of a knife, awakening a deeper terror. As he gradually came into contact with the cruel truth that Xia Lan was forced to leave, he also approached the core of the closed-loop alley that swallowed everything. The only way to get out may be to become its new "host"... Or to find the almost non-existent "loophole".
This is a journey to find the truth on the edge of madness. Every stranger's regret he picks up may become his own grave and also illuminate the glimmer of humanity.
