LAST REVENGE Crime &Thriller

Launa and Emma were twins. They were neglected since their childhood; after being free adults when they hoped to live freely, an incident changed their life.
One cozy morning a phone call changed her life making the future dark.
When she followed the instruction and reached the location...
"Launa has committed suicide."- Tom whispered in her right ear sobbing.
while looking at her own sister's dead body her eye caught a harsh bite on her neck.
"what's that? what's that on her neck"-she mumbled at my own thoughts.
"That wasn't a suicide, it's clearly a murder; Tom"-she said strongly.
"What do you mean? how can you say that?"- He said wiping his sweat drops on top of his forehead...
Who was the murderer? Will she be able to find the killer and kill him with the taste he gave to her sister???
Is her sister dead? Or is something else waiting???