This book tells the story of two school lovers who broke up for various reasons, met again in the same police unit many years after graduation and became colleagues. After jointly experiencing cases such as a headless man's corpse in the closet, a woman's corpse by the river, a missing girl, human bones in a flowerpot, etc., The two gradually went from being estranged from each other at the beginning to solving the case together, and became more and more tacit, and the two once again gained a new understanding of each other's feelings. But a sudden drug lord case puts the two of them into danger step by step. The two decide to work together to find clues, hoping to completely eradicate the drug chain. The two continue to explore according to the clues, but they find that this time it is not a simple drug lord... The twist of fate speeds up the pace of the two. Can the two return to each other and let the sun shine underground...
Concept: Reunited lovers work together to solve crimes and unearth the darkness