In the Hong Bay district of Hong Kong, crimes of every shape and size are commonplace. But not letter bombs... When Detective Inspector Spencer narrowly escapes becoming a victim, the Yellowthread Street police are grimly determined to track down the culprit.

In the Hong Bay district of Hong Kong, crimes of every shape and size are commonplace. But not letter bombs... When Detective Inspector Spencer narrowly escapes becoming a victim, the Yellowthread Street police are grimly determined to track down the culprit.