You've been pressed into community service for breaking interplanar law. You're going to have to be clever to finish their impossible tasks efficiently and get your sentence commuted, all while playing by the rules (at least while the Inevitables are watching).
This is a lighthearted series of adventures intended for characters level 8-12 in the Planescape setting. It's what happens when a game of Paranoia is set in Dungeons and Dragons.
A rumour of the knights of some powerful king that sleep until danger threatens the kingdom.
The truth is that they were rebels, trying to split the kingdom. Once captured they were put into an enchanted sleep, protected from age and harm, until their aims have been carried out by others in which case they will awaken.
There is a loophole in the spell in that trying to take one of their weapons will also awaken them.