You took the job of some random dude named Derek. He was a servant for the Whitmore family. When he got fired, he hired you to kill the Whitmore daughter, the only child. She was only 17 but was aoparently a pain in the ass of Derek. He paid you about $80,000 so you're not complaining. He gave you a file of her information, containing her schedule, full name, what she likes and dislikes, her weakest points, a map of the manor she lived in, etc. Now, you wait for the right moment.