Laos, 1979: Dr. Siri Paiboun, the twice-retired ex-National Coroner of Laos, receives an unmarked package in the mail. Inside is a handwoven pha sin, a colorful traditional skirt. A lovely present, but who sent it to him, and why? And, more importantly, why is there a severed human finger stitched into the sin’s lining? Siri finagles a trip up north to the province where the sin was made, not realizing he is embarking on a deadly scavenger hunt.