OldCaptainWZJ has it right, good luck! As a (slightly spoilery) meta-comment about puzzles like this in general: V gbb nyjnlf trg fghpx ba chmmyrf juvpu rkcybvg na vagrenpgvba V unira'g grfgrq lrg. V graq gb nibvq ghgbevny yriryf - cnegvphyneyl sbe wnz tnzrf - ohg guvf xvaq bs ceboyrz vf gur qbjafvqr bs gung.