The cache you seek is the first installment of the Count Down to Halloween Series. You must find all 6 to get the clues to the bonus final puzzle.
Keep an eye out for the final as well as check back here for the other stages.
6 More Days to Halloween - Beware of the Black Cat GC3YT4M
5 More Days to Halloween - The Witching Hour GC3YXM3
4 More Days to Halloween - Sleepy Hollow GC3YWWH
3 More Days to Halloween - Ghost & Gobblins GC3YWX7
2 More Days to Halloween - Witch's Lair GC402BF
1 More Day to Halloween - All Hallows Eve GC3ZVN4
Final Bonus Cache
Halloween Is Here-Its Time to Free the CryptKeeper GC3YT4C
Cache is log only so BYOP. No credit without signature. Please, No Spoiler Pics.
Congrats to RAZOOTWO for FTF