The Killer in the West

Have you ever heard of the contract killer named 17A, no one has ever seen their face or even known if it is one man or woman? All they know is the job is done and their money is well spent. He or she has been known as the death mark or the disease because those who have been marked, never see the light of day ever again. One day Cali is on her computer exploring the deep dark web, and a message pops up, it reads "I have picked you to join me, you have three days to say goodbye to everyone before I take you in. This is an order." Think this was some random spam, she trashed the message, the next day she woke up in a dark and damp room with one strobing lightbulb.