Once you find the Lost Ark, your team will be one step closer to finding the plutonium! Follow the map to find the Ark. Each point on the map is a destination you will need to reach but make sure to plan out your path ahead of time so you don't fall into any booby traps!
The map is a bit hard to read...look around the room navigator for clues on how to crack the code.
Ancient legends say the Golden Idol may help guide lost souls. I don't know if it's true, you connect the dots.
Once you have found the Lost Ark bring it to New York City. Remember to pack your proton pack!