Solve the puzzle and find the cache. Difficuty rating is based on the cache, not the puzzle, although, the puzzle itself might be worthy of a D4 rating. Let me know. Also please log any DNF's I might up the Difficulty.
Here is the puzzle:
yjr vpptfd upi drrl str mptyj gptyu gpit gptyu fpt momr doc drbrm erdy docyu yjtrr yjotyu gobr fpt momr rohjy yjtrr.