Original Japanese title: Ryūchidō no Shiren (龍地洞の試練).
Boruto and friends head for Ryuchi Cave in order to see the White Snake Sage. But it's not a simple task, since they have no clue where it is. They search for miles, becoming hungry and tired. They are near their limit when Ryuchi Cave suddenly appears before them along with mysterious women to guide them. They are told they must pass a series of tests in order to meet the White Snake Sage!