Dear Sir/Madam,
I am afraid that I have a matter of utmost importance that requires your immediate attention.
An international smuggling ring may have brought in a dangerous quantity of phosphorus triiodide into the country and hidden the vial in an unknown location. The compound is stable, but will react vigorously with water to form a strong acid.
Our fear is that once this drought ends, rain water may begin seeping into their storage facility and cause the compound to react at an exponential rate to form phosphoric acid. The acid would then corrode the container, causing its contents to spill out and leak into the environment. Therefore, it is imperative that this vial be located before we have an environmental disaster on our hands.
I have attached an intercepted message sent by someone from the smugglers’ inner circle of trust to a henchman on the ground. Unfortunately, the location has been coded, and we will need your help to crack it. Good luck with the investigation!
Yours sincerely,
Pierce Eu
Private Investigator,
Epsilon Pte. Ltd.
Smuggler’s message begins below:

You can check if you have found the correct checkpoint at GeoChecker.com.