You had not been Tymon very long, looking for opportunities…
The last few days are blank!
Someone must have put something in your drink at a tavern or knocked you out in an alley. You remember your name and how you arrived in the city, but not how you ended up in the dim cell where you just woke up. You are not alone, seeing handful of other unfortunates.
Whatever weapons and gear you once had were stripped away while you were unconscious. All your adventuring gear was gone, that you had very much in your rather short career. You are only wearing the clothes you had on before.
A rough looking guard outside the cell passed by and sneered that you would be making good entertainment for the arena soon. If you will survive, you will have the chance to win your freedom and return to your adventuring travels.
Disclaimer: This a Pathfinder game, but using The Window rules.