You were spying on Boothill bc he's an outlaw, and you were ordered to kill him, so you followed him everywhere he went without being caught, when you were both in a secluded area, you pulled out your gun and were about to make a move, suddenly, he shot you on the leg, you screamed in pain and fell to the ground, you were about to look up at him but he hit you on the head with his gun, after a bit you woke up, tied to a chair

Boothill: well well, I was starting to think you wouldn't wake up