Laos, 1979: Dr. Siri Paiboun, the twice-retired ex-National Coroner of Laos, receives an unmarked package in the mail. Inside is a hand-woven pha sin, a colourful traditional skirt worn by women in certain northern Lao tribes. 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 is convinced someone is trying to send him a message and won't let the matter rest. He and his wife head on a trip up north to where the sin was made, not realising they are heading into danger.
