Watchmaker Zhou Yansheng possesses the talent known as "Echoes of the Past."
When he touches an old object steeped in intense emotion, he can hear the final echo left by the deceased at the moment of their death.
But this power comes at a cruel price: each time he reads a fragment of someone else's past, he permanently loses one precious memory of his own.
Seven years ago, his sister Zhou Yanqiu disappeared while guarding the seal on the Silent Wave, leaving behind only a faint echo. Zhou Yansheng follows her trail through old objects, but along the way, he gradually forgets what she looked like.
On a rainy night, a mute bronze bell of the same origin is secretly delivered to his watch shop, plunging the old city into turmoil.
The He family seeks to gather all seven bells and unleash a Silent Wave across the entire region, erasing the painful memories of everyone in the city. To protect the people, the Archives must seal away the bells, which would completely extinguish the last trace of his sister's voice and soul.
With the safety of the entire city on one side and the final traces of his loved one on the other, Zhou Yansheng is caught in a dilemma.
An even more terrifying enemy, the Silence, lurks in the shadows, roaming the seven Echo Cities and preaching that "forgetting is mercy." It exploits people's pain, coaxing them into willingly giving up their memories.
Through one bloody battle after another, his memories are steadily hollowed out.
When all his past has vanished, will he still remember the person he fought with all his might to protect?
Old things preserve their echoes; the traces of time endure forever.
