An apocalyptic disaster known as the "Heart Abyss" swept the world. The scary thing is:
The infection is silent: it spreads through the strongest emotional connections between people (love, hate, dependence, guilt).
Parasitism and tampering: The infected person will gradually be parasitized by the "Heart Abyss". It may seem normal, but in fact, the memory, cognition, and emotions are distorted, becoming a "phantom" that seduces and preys on the people they love.
Collapse of trust: The biggest terror in the apocalypse is that you cannot tell whether the person in front of you is a close relative or the skin of a monster parasitic in your body.
It's a nice novel