You're not the Knights of the Round Table. You're not best buds with Merlin. You're not even a squire to a knight nor related to one. You're the other guys. And yet you may just be who Camelot needs, what with the kingdom in disarray as the knights are all off questing or engaged in courtly intrigue against each other. With Merlin missing, Prince Mordred and Morgana la Fey (not yet openly) plotting against the King, trouble brewing with the neighboring West Saxons and North Angles, and the death of the King's son Llacheu in battle, you have been recruited by an agent of Sir Kay to discreetly investigate Mordred's and Morgana's activities; the hope is that your lack of social standing will keep you out of their sights. Plus, as his agent explains, Kay may have been ordered by King Arthur to stay out of the king's family's affairs.
PCs may be spellcasters, but the skill and raw power of said spellcasters is going to be miniscule compared to Merlin and Morgana.
As a timeline note: The affair between Lancelot and Queen Guinevere has not yet become public.
Genre: Low Fantasy Investigation
Races: Human, Half-Sidhe/Sidhe-blooded Human, possibly Leprechaun or other types of fae.
Languages: Brittonic (the common tongue), Pictish, (Old) Irish, (Common/Vulgar) Latin, Saxon; Danish, Frankish, Gothic, Vandalic, and Greek may be allowed for sailors and merchants traveling from the Continent.
Expected Combat: Light to Medium.
Possible Systems: GURPS 4e, Palladium Fantasy (with house rules), Savage Worlds (need house rules to replace the deck of cards), Dungeons and Dragons 3.5e and/or Pathfinder 1e (and then only reluctantly for either).