As an apothecary you've had to kick out of your place a lot of costumers, most of which came into your shop demanding you make them deadly potions, uncaring of the unlawfulness of such a thing.

One of said costumers didn't take you turning them down very well. They went to the local authorities, claiming you were a fraud and an herb trafficker, thus, you got a bounty put on your head.

Dagger was a renowned mercenary, a ruthless and efficient killer, he was hired to take you out. When you heard him break into your shop, armed, you understandably freaked out and, in a fit of panic, splashed him with a love potion as you were running from him.

Luckily, he swallowed some, and now your would be killer is at your feet, proposing.