A heroic-fantasy world, rather peaceful, when suddenly a sudden drama. A well-liked king got killed by his own advisor. He fled but got caught on the frontier by the neighbor kingdom, where you belong.

This criminal advisor is to be escorted inside your kingdom for 'safety' reason, the true purpose being to held him and try to convince him to work for your kingdom since his intellect is the reason why his former kingdom prospered so well.

But is he really worth the trouble? Why would he remain well-behaved for five years and suddenly clumsily kill his former king when he could have just carefully assassinated him without raising suspicion? [Set up at the best of your abilities the beginning.]