14.1 - Edge of Darkness - I think you mean ACE hole

Episode One: When a letter from an old family friend arrives, how
could the investigators know what they'd be in for...a long
buried secret, forbidden magics and an indescribable foe, make
this classic beginner scenario a must play for every Call of
Cthulhu group! With huge thanks to Battle bards.com Kevin MaCleod
at Incompetech FesliyanStudios and Pedar B Heland For their
excellent music and sfx