What is the echo?

Hello people.
          I am trying to find a Percy Jackson and Batman crossover story that has been one of my favorites, but I can't find it; it has either been deleted by the author, or I never saved it. The main premise is that Percy is in Gotham because everything bad that could happen has happened. Percy was adopted into the Batfamily and he has zero idea that they are superheroes.  At some point, he gets kidnapped, but he is okay.  
          If anyone knows this story, can you tell me what it is called, or if it has been deleted? I haven't seen it in so long.
          (I don't know who the author is.)
          Thank you

Thank you for voting on ‘Take on Me’ I hope you enjoyed reading it!

Thank you for voting on my fanfic, I really appreciate it

Hello, thank you for voting on MAD. I hope you do enjoy the reads.
          
          Love, Alpha. 

Thanks for adding my story again!

Thanks for adding my book to your reading list!

THANKS FOR ADDING MY STORY!

Thanks for adding my book to your reading list!!!

uh, thanks for voting 
          here's a pizza *gives pizza*
          i hope you like pizza like i do ;P