Rescue Them At Your Leisure
You find a box in the attic.
This box contains a museum exhibit. An ancient parchment lies under glass. An archaeological report included with the parchment tells that it was dug up from the Egyptian desert during the 1920’s and has been dated to approximately 300 BC.
The writing on the parchment is in modern English and requests that help be sent to a time travel team at the specified coordinates. You cannot make sense of the numbers that follow.