One day some PCs are just relaxing in a Inn (dm's choice) and a squire rides into town. He nails a message up all through out the city/town. The PCs see the page and quickly rush outside to take a look at the message. It's a invitation for all elves to King Krondin's Keep.
Note: if the PC/PC's aren't elven then this adventure can't be played. Once everyone is in the keep's Banquet hall, King Krondin begins his speech about how the elven race is the best among the hole world. But later into the speech, his eyes start to glow bright blazing blue and he then commands for the guards to block the exit and then to kill them all. The guards rip their helmets off and reveal their razor sharp teeth that they later on use to rip the elves limb by limb. The King sees the PC's and orders the guards to capture them and keep them for the next meal. That's where the DM has to get creative and make the rest up because I am tired.