Sometime after visiting Tongdang's hut to retrieve a breathing apparatus, Gina tells Indy that a child, Sunan's nephew, has disappeared from the village, triggering the field research quest “The Child Who Disappeared.” Indiana Jones and the Great Circle.
In this side quest, Indy and Gina must explore a temple in the Wat Si Sawai area to find Aran. The temple was used to test warriors and will therefore be filled with puzzles, particularly pipe puzzles.

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Field research quest “The Child Who Disappeared” in Indiana Jones and the Great Circle.
After triggering the quest, follow the marker on the map to the nearby location near Tongdang's Hut to begin searching for Aran. Explore the area and keep going until the treehouse appears. Climb the ladder and lift the wooden plank inside to find a letter from Aran. Now that you know it's somewhere in Wat Si Sawai, you can head there using the boat or a nearby fast travel sign.
When you arrive at Wat Si Sawai, wear Royal Army outfit Indiana Jones and the Great Circle Otherwise, to reach the Khmer Warriors' Temple safely, you'll have to sneak around and fight your way. After reaching the temple, continue walking until you come to a room with rubble in the middle and hear Aran's voice. He explains that he is stuck and needs help.
Turn left and turn the lever with Gina to open the door. Use the lighter to light the wood and see better. Grab the single pipe segment and place it in the pipe slot to allow water to flow, thereby opening the nearby door. Go into the other room to find a stuck platform. Aran explains that you have to lift it to reach him.
How to raise the platform in Indiana Jones and the Great Circle
Walk forward from the platform, then turn left and walk on the frozen gears to get to another area. Approach the fallen beam and climb the upper hill to the left. Keep going until a wooden platform appears, which is also part of a giant gear. Quickly jump onto it and then to the field in front of you. Wait for Gina to cross, then jump down to find another pipe segment puzzle Indiana Jones and the Great Circle.
How to solve the problem:
- Turn the wheel on the left to activate the water source.
- Take the pipe segment and place it in the pipe slot in front of the closed door, which will open it.
- Go inside to find another semi-circular pipe segment.
- Get out and place the new segment on the ground for now.
- Take the first segment and insert it into the other slot. Then take the semicircular segment and insert it into the first slot facing west.
- Finally, push the giant gear with Gina and pull the lever underneath to leave the room.
Now that the platform is raised, you need to find Aran.
How to reach Aran in Indiana Jones and the Great Circle
After solving the puzzle, go left to walk on the now activated gears until you climb onto the tree root. Wait for the gear to turn to an opening and go through it. Use a combination of jumping and swinging with the whip to reach the large gear you need to crawl under. Go through the door and pull the lever to help Gina up.
When the next door closes, Indy and Gina have to turn the lever together to open it. Go down the stairs, go past the gears, then turn right. Pull the nearby lever to build a bridge and cross it to find a large pipe puzzle. Solve it to meet up with Aran.

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How to solve the pipe puzzle in Indiana Jones and the Big Circle.
To solve the pipe puzzle you need to activate the left water source since the right one is already activated and find four pipe segments. First, climb the ladder to the left and turn the lever to activate the left water source.
Two pipe segments are on each side of the room (1) and (3). Simply climb the left and then right stairs to find it. One is in the room, next to it is a jar of torches (2). The last one is locked behind a closed door (4). To get the last one:
- Place the T-shaped pipe segment in the first central pipe shaft towards the east.
- Place a Semicircular pipe segment in the pipe slot next to the closed door facing east.
Once the door is open, grab the final pipe segment to finally solve the puzzle.
At the end of the puzzle there are three main pipes, each leading to a drain. Indy needs to place the pipe segments so that all three main pipes pump water into the three drains:
- The first pipe slot in the middle is the T-shaped segment (1).
- The one underneath is a semicircular segment (3).
- The other semicircle (2) should be on the right side.
- Place the straight pipe segment (4) on the left side.
Just follow the placement shown in the images above.
Once the Khmer Whistle puzzle is solved, head through the newly revealed door to meet Aran. After a short conversation, follow him into the secret room he discovered to find an ancient relic. Finally, return to Uncle Sunan in the village and tell him that Aran stayed at the temple to explore and complete the field research quest “The Missing Child”.