The 40th Clue ?

"Is this the place?"

Dan Cahill stuttered as he walked up to the graveyard. It was not the Boston cold air that was making him stutter, though. The prospect of what he was going to do would change his life forever.

"Yes, it's got to be." Amy Cahill, Dan's 15-year sister, walked behind him. Along with Amy was their au pair, Nellie Gomez. Dan looked at the script he held. He remembered when he had got it. It was on Easter Island, right after him, Amy, and the other Cahill children had been at gunpoint with the evil, filthy rich Isabel Kabra behind the trigger. How they had got out was an impossibly hard explanation, but thank god they did. After that, William McIntyre, the current leader of the Madrigal Branch had given them this script, which would lead to the 40th clue. Dan, Amy, and Nellie all had been shocked at the prospect of another, but they agreed to find it.

Now, back in Boston, Dan was entertaining the thought of the last clue being gold and diamonds. The Clue Hunt completely changed him, but there was still a part of him wanting to be a ninja. That part no longer could be seen.

Dan looked at the script, although his photographic memory still helped him remember it :

The last part missing to the eternal family will rest next to the resting place of the Madrigal Leader with the most charm.