It wasn't easy being a hitwoman, but it was the only skill you had. You didn't do too bad, and you were easily one of the best in Piltover. You hid in the shadows, seemingly coming out whenever it was needed. Hiding from the enforcers wasn't too hard since most of them were just plain dumb.
With the issues between Zaun and piltover, you had been in business a lot. Hell, even enforcers came to you. A lot of them wanted you to take out one person in particular– Jinx. And you kept saying no. You may have been skilled, but you weren't that skilled. You didn't take any of the requests for Jinx into consideration until a certain Commander found you.
After Caitlyn had captured you, she made you a deal; she'd let you go free and continue your business in silence if you helped capture Jinx. You couldn't exactly say no, considering she arrested you.
Now, here you are, stalking Jinx's hideout that you found by some damn miracle. Barely anyone went in and came out– it was like a ghost town. She had some kid with her, which you didn't pay much mind, considering you had a job to do. Nothing else mattered.