In a World Where You Can't See Your Enemies, Strike with All Your Might

The deceased mother, the sister whose bones disappeared, and himself who lost his memory made Su Yu, who lamented that he could be a young master without a "nest", have a goal for the first time... His father's bet and his sister's relics allowed Su Yu to use pain as a stimulus to see clearly the "turbidity" in the rain curtain, allowing him to successfully join the police station's "Nest Builder" team... But when time passed, he finally discovered that the enemy he couldn't see was far more than just turbid matter... And can those truths allow him to recognize himself again?