Under this bustling city called "Streaming City", there is an unknown industry hidden - emotional extraction. People can entrust unforgettable memories, unbearable sadness, or fleeting ecstasy to a "heart crystal extractor" and seal them in special crystals, thereby gaining spiritual relief.
Gu Yebai is such an extractor. He runs an antique shop called "Sea of Forgotten", but is actually a skilled but mentally exhausted extractor. An accident many years ago caused him to lose the ability to perceive his own strong emotions. He could only act like a bystander, calmly handling the joys, sorrows and joys of others. He is like the deep sea, calm and waveless, cold and lonely.
Until one day, a woman named Shen Xingran broke into his world. She was like an unquenchable flame, haunted by a recurring nightmare full of fire and betrayal, on the verge of collapse. She brought a sample of complex emotions that had never been seen before. Its intensity and danger were enough to destroy any extractor's mental defense.
Gu Yebai accepted this difficult commission, but he never expected that this "fire" imprinted deep in Shen Xingran's soul would be inextricably linked to his lost emotions and dusty past. When the extraction begins, two lonely souls are forced to dive into the abyss of memory. Not only do they have to fight against that memory that can burn their minds, but they also face a mysterious organization that lurks in the shadows of the city and covets powerful emotional power. This is a game about redemption and being redeemed, forgetting and remembering.