To celebrate Seok Jin's 60th birthday, Running Man throws the Great Gatsby Ji party, complete with special Big Nose Coins. The more coins members earn, the greater their advantage in the race. But chaos strikes when Seok Jin's coins vanish in a sudden heist. Now, the members must search for hidden clues or spend their coins wisely to track down the thief. The first to recover the stolen fortune wins it all and escapes the penalty. Who stole the coins?