"Boojum" Line Puzzle

 

"Find the Story Line" Puzzle

XM,  S  AMX'C  HJXC  CM  LO  J  LTJSX  SX  J  DJT,  LPC  S'D  XMC  FOOSXB  J  EMC  MI NRMSNOF ROTO.

Substitute the letter B for L, but not L for B.

ANSWER

NO, I DON'T WANT TO BE A BRAIN IN A JAR, BUT I'M NOT SEEING A LOT OF CHOICES HERE.