The river that disappeared

Ronald and Tony arrive at Sokha’s repair shop in Siem Reap.
Sokha: Thank you for coming, Ronald.

Sokha opens her father’s old surveying case on the bench.
Sokha: My father left this. Something rattles underneath.

Ronald lifts a false bottom inside the case, revealing a hidden map.
Ronald: There’s another compartment.

An unfolded map has a blue waterway and a handwritten note.
Map note: We looked for the entrance in the wrong season.

Ronald studies the map while Tony watches the street.
Ronald: Why hide a map inside a case?

Tony sees a stranger watching the shop from across the street.
Tony: Ask the man who’s been watching us.