Herb Shop Cadenza: The Kiss of Death - A Mystery Hidden Object Game (Full) Guide
Added:
Just hand over the item the fireworks merchant gave to you to the herbalist. You will gain access to his secret lab.
All of the encircled locations have puzzles for you to solve and are vital for you to get the ingredients mix up the antidote.
Below, you can see the green X spots for you to check out. They have the ingredients there and just return to the secret lab to concoct the antidote yourself.
