In April 1987, a family of four was murdered in the Tsuen Wan Police Station dormitory. A brush-written note pinned beneath a hammer, "Loan Shark King guarantees the kill," led the investigation toward loan sharks. But the details at the scene, from misspelled simplified characters and a knife wiped spotless to an unnecessary wire and the silhouette of someone whose "right shoulder sloped downward," all pointed to a clumsy disguise. As the truth was peeled back layer by layer, it led to a twisted affair that began in a nightclub, a love gone out of control, and a night that could never be undone...
