An advanced satellite scan of the mountain reveals metal deposits underground; the team targets three sites believed to be the access points to Yamashita's gold: a waterfall, a crater known as Breach 6, and a camouflaged tunnel.

With new evidence suggesting the location of a possible treasure vault beneath the waterfall, John is determined to find a way in, but Mother Nature is wreaking havoc on his plans; information is revealed about the knife that was found.

Another promising clue at Breach 6 leads Rick to believe they're on the right track. John hits a roadblock on his search for a tunnel entrance near the waterfall, Bingo makes an incredible discovery that could lead him to Golden Lily treasure maps.

John plans to drill across the mountain; Rick finds an artifact at Breach 6 that could confirm Japanese military presence; Levi and Geo make a grim discovery in the tunnel; Bingo meets someone with rare and valuable knowledge.

Breach 6 reveals its first piece of treasure; Levi and Geo come up with a creative solution to get past a mysterious collapse in the tunnel; while drilling toward a possible treasure vault, John and Rob make a startling discovery.

As the team finally gets to the bottom of Breach 6, startling new evidence suggests they might be too late; the miners trigger a hazard in the tunnel, which threatens their safety; Bingo unearths alarming evidence a little too close to home.

When a dead end in the tunnel threatens to close the door on exploration, a back door opens. Using their recently decoded Golden Lily map, the team discovers new access points, hoping to get under the waterfall by any means necessary.