Silent Echo or Heart Erosion is a near-future urban supernatural mystery. The story takes place in Xingang City, a gloomy metropolis shrouded by an energy layer known as the "Dome." The protagonist, Lin Mo, can sense other people's emotions and thoughts, but as a result, he has long endured the torment of mental noise from the city's eight million residents. A sudden incident known as "Mental Annihilation" drags him into a maelstrom: a biologist dies under mysterious circumstances, his thoughts completely erased, leaving behind only an utterly silent mental void. Forced to contend with the authorities and the mysterious company "Paradise Beyond," Lin Mo investigates the truth through layer upon layer of fog. As strange phenomena such as the "River Styx Project," "Reverse Mental Traps," and "Data Stream Eyes" emerge, he gradually discovers that behind the incident lurk terrifying experiments and powers capable of overturning humanity's understanding of the world.