Okay, here are the clues:
ACID, ROCK, JAPANESE GARDEN.
Thank you. Here's an easy one;
Party, painting, poison
Peril At End HouseNo, that's not the one.
The Mirror Cracked
YES, that is it!
There was a PARTY at the beginning.
One character looked at a PAINTING that reminds her of something.
She then employs POISON to have her revenge.